oneshotlm
Compare all models on this prompt →

L-system tree · gpt-6.1-sol

Output generated Cost / run $0.1758 Runtime 238.0s

Prompt for this run

Using the pre-provided p5.min.js (global p5), grow a procedural L-system fractal tree that branches recursively and sways gently in the wind.

⛨ sandboxed Open in new tab ↗

TAKE IT TO CODE

A single self-contained HTML file — copy it and open in any browser, or reuse the prompt with your own pi-agent run.

RUN

modelgpt-6.1-sol
vendorOpenAI
harnesspi 0.87.1 · browser iteration
generated2026-10-05

METRICS

runtime238.0s
tokens in318k
tokens out7.0k
cached287k
cost / run$0.1758
Transcript · 37 messages
system

user

Using the pre-provided p5.min.js (global p5), grow a procedural L-system fractal tree that branches recursively and sways gently in the wind.

assistant
→ bash {"command":"ls -la","timeout":10}
toolResult

total 1024 drwx------ 3 node node 4096 Oct 5 00:38 . drwxrwxrwt 6 root root 4096 Oct 5 00:38 .. drwxr-xr-x 3 node node 4096 Oct 5 00:38 .home -rw-r--r-- 1 node node 1034532 Oct 5 00:38 p5.min.js

assistant
thinking
**Planning tree growth simulation**

I'm thinking about drawing a sequence with around 3,000 segments and 1,200 leaves, which should be manageable. I want to use p5 vector standard math to help fit everything. I’ll grow the lines by interpolating based on maximum distance growth and track the progress over about 8 seconds. Starting at around 0.25 for the initial browser screen could work. Maybe an option to regrow the full tree after the initial growth, letting the user start the growth at 0.15.

I’ll build a living L-system study with animated growth, gentle wind, and controls for the tree’s structure.

→ write index.html (14650 bytes)
toolResult

Successfully wrote to index.html

assistant
→ browser {"action":"reload","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}
toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"arbor /\nA STUDY IN GENERATIVE NATURE\nLiving simulation\nORDER, REPEATED. NATURE, EMERGING.\nFrom a rule, a tree.\n\nA small set of instructions, a thousand little branches.\nPlant a seed. See what grows.\n\n01 THE GROWING FIELD\nGROWING · 3%\nL-SYSTEM / RECURSIVE BOTANICAL STUDY\nGrowth parameters\nLIVE\nIterations\n6 generations\nEach generation adds a little complexity.\nBranch angle\n25°\nThe space between each new possibility.\nWind strength\nGentle · 30%\nA breeze to keep things moving.\nCURRENT SEED\n08421\n↝   New seed\nGrow again\nSame rules. Endless possibilities.\n1,330\nBRANCH\nSEGMENTS\n729\nLEAF\nNODES\n06\nRECURSIVE\nGENERATIONS\nTHE RULE X → F[+X][−X]FX   /   F → FF\nBuilt from mathematics. Moved by nature.","images":"attached"}

assistant
→ browser {"action":"screenshot","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}
toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"arbor /\nA STUDY IN GENERATIVE NATURE\nLiving simulation\nORDER, REPEATED. NATURE, EMERGING.\nFrom a rule, a tree.\n\nA small set of instructions, a thousand little branches.\nPlant a seed. See what grows.\n\n01 THE GROWING FIELD\nGROWING · 51%\nL-SYSTEM / RECURSIVE BOTANICAL STUDY\nGrowth parameters\nLIVE\nIterations\n6 generations\nEach generation adds a little complexity.\nBranch angle\n25°\nThe space between each new possibility.\nWind strength\nGentle · 30%\nA breeze to keep things moving.\nCURRENT SEED\n08421\n↝   New seed\nGrow again\nSame rules. Endless possibilities.\n1,330\nBRANCH\nSEGMENTS\n729\nLEAF\nNODES\n06\nRECURSIVE\nGENERATIONS\nTHE RULE X → F[+X][−X]FX   /   F → FF\nBuilt from mathematics. Moved by nature.","images":"attached"}

assistant
thinking
**Exploring tree height and shape**

I’m considering if a tree with a height cap of 375 would likely be a narrower conifer. It sounds like the height restriction could indicate a type of tree that doesn't spread too wide, which fits with the conifer family. Coniferous trees are known for their upward growth and often take on a more slender shape. I wonder what specific species would fit this description! Let's look into that further.
→ browser {"action":"motion","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}
toolResult

Frame 1, +0ms

[Browser image supplied to model]

Frame 2, +584ms

[Browser image supplied to model]

Frame 3, +1274ms

[Browser image supplied to model]

Frame 4, +1866ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"arbor /\nA STUDY IN GENERATIVE NATURE\nLiving simulation\nORDER, REPEATED. NATURE, EMERGING.\nFrom a rule, a tree.\n\nA small set of instructions, a thousand little branches.\nPlant a seed. See what grows.\n\n01 THE GROWING FIELD\nIN THE BREEZE\nL-SYSTEM / RECURSIVE BOTANICAL STUDY\nGrowth parameters\nLIVE\nIterations\n6 generations\nEach generation adds a little complexity.\nBranch angle\n25°\nThe space between each new possibility.\nWind strength\nGentle · 30%\nA breeze to keep things moving.\nCURRENT SEED\n08421\n↝   New seed\nGrow again\nSame rules. Endless possibilities.\n1,330\nBRANCH\nSEGMENTS\n729\nLEAF\nNODES\n06\nRECURSIVE\nGENERATIONS\nTHE RULE X → F[+X][−X]FX   /   F → FF\nBuilt from mathematics. Moved by nature.","images":"attached"}

assistant
thinking
**Evaluating tree structures**

I’m exploring ways to improve tree structures with a classic rule X=F[+X][-X]F[+X]-X that produces a broad canopy with 4 leaves and a depth of 6. There are alternatives like changing X to F=FF for a ternary branching with fewer leaves. I'm considering simplifying by removing extra segments and adjusting angles to maintain balance. I think using rules like X=F[+X][-X]X might also yield a denser canopy, so I’ll keep refining these ideas!**Refining tree branching**

I think I need to make the branches grow more organically because the current segments look too straight and rigid. I’m considering tweaking the growth to a factor of 1.65 instead of 2, which doesn't quite fit the L-system. Sticking with the classic rule while adjusting X to 'F[+X][-X][+X]X' could create density, but I need to watch out for duplicates and angles. I’ll stretch the x coordinates for a broader, Christmas-style tree but make sure there’s some tapering to enhance the overall shape!
→ edit {"path":"index.html","edits":[{"oldText":"X → F[+X][−X]FX","newText":"X → F[+X][−X]X"},{"oldText":"'F[+X][-X]FX'","newText":"'F[+X][-X]X'"},
toolResult

Successfully replaced 3 block(s) in index.html.

assistant
→ browser {"action":"reload","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}
toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"arbor /\nA STUDY IN GENERATIVE NATURE\nLiving simulation\nORDER, REPEATED. NATURE, EMERGING.\nFrom a rule, a tree.\n\nA small set of instructions, a thousand little branches.\nPlant a seed. See what grows.\n\n01 THE GROWING FIELD\nGROWING · 2%\nL-SYSTEM / RECURSIVE BOTANICAL STUDY\nGrowth parameters\nLIVE\nIterations\n6 generations\nEach generation adds a little complexity.\nBranch angle\n25°\nThe space between each new possibility.\nWind strength\nGentle · 30%\nA breeze to keep things moving.\nCURRENT SEED\n08421\n↝   New seed\nGrow again\nSame rules. Endless possibilities.\n665\nBRANCH\nSEGMENTS\n729\nLEAF\nNODES\n06\nRECURSIVE\nGENERATIONS\nTHE RULE X → F[+X][−X]X   /   F → FF\nBuilt from mathematics. Moved by nature.","images":"attached"}

assistant
thinking
**Considering growth and speed**

I need to focus on speeding up the process for grow4s. It seems like testing pauses and iterations could really help streamline things. I'm curious about how to effectively implement this without losing the quality of the results. Let's think about finding a good balance between efficiency and thoroughness. Maybe I could explore different methods to achieve that! It feels important to ensure that I’m being effective while still maintaining the necessary steps.
→ browser {"action":"click","x":784,"y":672,"toX":0,"toY":0,"text":"","delta":0}
toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"arbor /\nA STUDY IN GENERATIVE NATURE\nLiving simulation\nORDER, REPEATED. NATURE, EMERGING.\nFrom a rule, a tree.\n\nA small set of instructions, a thousand little branches.\nPlant a seed. See what grows.\n\n01 THE GROWING FIELD\nPAUSED\nL-SYSTEM / RECURSIVE BOTANICAL STUDY\nGrowth parameters\nLIVE\nIterations\n6 generations\nEach generation adds a little complexity.\nBranch angle\n25°\nThe space between each new possibility.\nWind strength\nGentle · 30%\nA breeze to keep things moving.\nCURRENT SEED\n08421\n↝   New seed\nGrow again\nSame rules. Endless possibilities.\n665\nBRANCH\nSEGMENTS\n729\nLEAF\nNODES\n06\nRECURSIVE\nGENERATIONS\nTHE RULE X → F[+X][−X]X   /   F → FF\nBuilt from mathematics. Moved by nature.","images":"attached"}

assistant
→ browser {"action":"click","x":784,"y":672,"toX":0,"toY":0,"text":"","delta":0}
toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"arbor /\nA STUDY IN GENERATIVE NATURE\nLiving simulation\nORDER, REPEATED. NATURE, EMERGING.\nFrom a rule, a tree.\n\nA small set of instructions, a thousand little branches.\nPlant a seed. See what grows.\n\n01 THE GROWING FIELD\nGROWING · 78%\nL-SYSTEM / RECURSIVE BOTANICAL STUDY\nGrowth parameters\nLIVE\nIterations\n6 generations\nEach generation adds a little complexity.\nBranch angle\n25°\nThe space between each new possibility.\nWind strength\nGentle · 30%\nA breeze to keep things moving.\nCURRENT SEED\n08421\n↝   New seed\nGrow again\nSame rules. Endless possibilities.\n665\nBRANCH\nSEGMENTS\n729\nLEAF\nNODES\n06\nRECURSIVE\nGENERATIONS\nTHE RULE X → F[+X][−X]X   /   F → FF\nBuilt from mathematics. Moved by nature.","images":"attached"}

assistant
→ browser {"action":"screenshot","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}
toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"arbor /\nA STUDY IN GENERATIVE NATURE\nLiving simulation\nORDER, REPEATED. NATURE, EMERGING.\nFrom a rule, a tree.\n\nA small set of instructions, a thousand little branches.\nPlant a seed. See what grows.\n\n01 THE GROWING FIELD\nIN THE BREEZE\nL-SYSTEM / RECURSIVE BOTANICAL STUDY\nGrowth parameters\nLIVE\nIterations\n6 generations\nEach generation adds a little complexity.\nBranch angle\n25°\nThe space between each new possibility.\nWind strength\nGentle · 30%\nA breeze to keep things moving.\nCURRENT SEED\n08421\n↝   New seed\nGrow again\nSame rules. Endless possibilities.\n665\nBRANCH\nSEGMENTS\n729\nLEAF\nNODES\n06\nRECURSIVE\nGENERATIONS\nTHE RULE X → F[+X][−X]X   /   F → FF\nBuilt from mathematics. Moved by nature.","images":"attached"}

assistant
thinking
→ edit {"path":"index.html","edits":[{"oldText":"X → F[+X][−X]X","newText":"X → F+[[X]−X]−F[−FX]+X"},{"oldText":"'F[+X][-X]X'","newText":"'F+[[X]-X
toolResult

Successfully replaced 5 block(s) in index.html.

assistant
→ browser {"action":"reload","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}
toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"arbor /\nA STUDY IN GENERATIVE NATURE\nLiving simulation\nORDER, REPEATED. NATURE, EMERGING.\nFrom a rule, a tree.\n\nA small set of instructions, a thousand little branches.\nPlant a seed. See what grows.\n\n01 THE GROWING FIELD\nGROWING · 4%\nL-SYSTEM / RECURSIVE BOTANICAL STUDY\nGrowth parameters\nLIVE\nIterations\n6 generations\nEach generation adds a little complexity.\nBranch angle\n25°\nThe space between each new possibility.\nWind strength\nGentle · 30%\nA breeze to keep things moving.\nCURRENT SEED\n08421\n↝   New seed\nGrow again\nSame rules. Endless possibilities.\n6,048\nBRANCH\nSEGMENTS\n4,096\nLEAF\nNODES\n06\nRECURSIVE\nGENERATIONS\nTHE RULE X → F+[[X]−X]−F[−FX]+X   /   F → FF\nBuilt from mathematics. Moved by nature.","images":"attached"}

assistant
→ browser {"action":"click","x":1050,"y":377,"toX":0,"toY":0,"text":"","delta":0}
toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"arbor /\nA STUDY IN GENERATIVE NATURE\nLiving simulation\nORDER, REPEATED. NATURE, EMERGING.\nFrom a rule, a tree.\n\nA small set of instructions, a thousand little branches.\nPlant a seed. See what grows.\n\n01 THE GROWING FIELD\nGROWING · 89%\nL-SYSTEM / RECURSIVE BOTANICAL STUDY\nGrowth parameters\nLIVE\nIterations\n6 generations\nEach generation adds a little complexity.\nBranch angle\n31°\nThe space between each new possibility.\nWind strength\nGentle · 30%\nA breeze to keep things moving.\nCURRENT SEED\n08421\n↝   New seed\nGrow again\nSame rules. Endless possibilities.\n6,048\nBRANCH\nSEGMENTS\n4,096\nLEAF\nNODES\n06\nRECURSIVE\nGENERATIONS\nTHE RULE X → F+[[X]−X]−F[−FX]+X   /   F → FF\nBuilt from mathematics. Moved by nature.","images":"attached"}

assistant
thinking
**Evaluating visual performance**

I have a great tree model in mind, but I realize the visual grid isn't displaying properly because of the stroke alpha set at 80—it’s quite light and subtle, which makes it hard to see. The default classic leaning tree looks good. I’m thinking about testing new seed regrowth in the wind, but iteration 7 with 16k might be heavy. It draws around 40 fps, and I might dial it back to around 6 or 7 for better performance.
→ browser {"action":"click","x":981,"y":301,"toX":0,"toY":0,"text":"","delta":0}
toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"arbor /\nA STUDY IN GENERATIVE NATURE\nLiving simulation\nORDER, REPEATED. NATURE, EMERGING.\nFrom a rule, a tree.\n\nA small set of instructions, a thousand little branches.\nPlant a seed. See what grows.\n\n01 THE GROWING FIELD\nGROWING · 2%\nL-SYSTEM / RECURSIVE BOTANICAL STUDY\nGrowth parameters\nLIVE\nIterations\n4 generations\nEach generation adds a little complexity.\nBranch angle\n31°\nThe space between each new possibility.\nWind strength\nGentle · 30%\nA breeze to keep things moving.\nCURRENT SEED\n08421\n↝   New seed\nGrow again\nSame rules. Endless possibilities.\n360\nBRANCH\nSEGMENTS\n256\nLEAF\nNODES\n04\nRECURSIVE\nGENERATIONS\nTHE RULE X → F+[[X]−X]−F[−FX]+X   /   F → FF\nBuilt from mathematics. Moved by nature.","images":"attached"}

assistant
→ browser {"action":"click","x":1094,"y":549,"toX":0,"toY":0,"text":"","delta":0}
toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"arbor /\nA STUDY IN GENERATIVE NATURE\nLiving simulation\nORDER, REPEATED. NATURE, EMERGING.\nFrom a rule, a tree.\n\nA small set of instructions, a thousand little branches.\nPlant a seed. See what grows.\n\n01 THE GROWING FIELD\nGROWING · 1%\nL-SYSTEM / RECURSIVE BOTANICAL STUDY\nGrowth parameters\nLIVE\nIterations\n4 generations\nEach generation adds a little complexity.\nBranch angle\n31°\nThe space between each new possibility.\nWind strength\nGentle · 30%\nA breeze to keep things moving.\nCURRENT SEED\n02231\n↝   New seed\nGrow again\nSame rules. Endless possibilities.\n360\nBRANCH\nSEGMENTS\n256\nLEAF\nNODES\n04\nRECURSIVE\nGENERATIONS\nTHE RULE X → F+[[X]−X]−F[−FX]+X   /   F → FF\nBuilt from mathematics. Moved by nature.","images":"attached"}

assistant
thinking
**Analyzing default angles and markup**

I'm considering how the default angle 31 looks striking, and I think I need to look at the default changes across three spots: markup input value, JS, and label. It makes me wonder if this design decision actually improves visuals. I also think the default tree might appear thinner, so I’ll need to inspect that default closely to understand its impact better. Let's ensure everything is aligned and visually appealing!
→ browser {"action":"reload","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}
toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"arbor /\nA STUDY IN GENERATIVE NATURE\nLiving simulation\nORDER, REPEATED. NATURE, EMERGING.\nFrom a rule, a tree.\n\nA small set of instructions, a thousand little branches.\nPlant a seed. See what grows.\n\n01 THE GROWING FIELD\nGROWING · 4%\nL-SYSTEM / RECURSIVE BOTANICAL STUDY\nGrowth parameters\nLIVE\nIterations\n6 generations\nEach generation adds a little complexity.\nBranch angle\n25°\nThe space between each new possibility.\nWind strength\nGentle · 30%\nA breeze to keep things moving.\nCURRENT SEED\n08421\n↝   New seed\nGrow again\nSame rules. Endless possibilities.\n6,048\nBRANCH\nSEGMENTS\n4,096\nLEAF\nNODES\n06\nRECURSIVE\nGENERATIONS\nTHE RULE X → F+[[X]−X]−F[−FX]+X   /   F → FF\nBuilt from mathematics. Moved by nature.","images":"attached"}

assistant
thinking
**Testing and capturing results**

I’m thinking about how I need to keep testing the wind measurement without wasting any resources. It’s crucial to verify the results, and I want to make sure I capture everything accurately. Maybe I can take screenshots of the data as it develops, this way I won't lose the information, and I can understand how things are changing over time. It’s all about getting it right! Let's keep pushing forward.
→ browser {"action":"click","x":1067,"y":457,"toX":0,"toY":0,"text":"","delta":0}
toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"arbor /\nA STUDY IN GENERATIVE NATURE\nLiving simulation\nORDER, REPEATED. NATURE, EMERGING.\nFrom a rule, a tree.\n\nA small set of instructions, a thousand little branches.\nPlant a seed. See what grows.\n\n01 THE GROWING FIELD\nIN THE BREEZE\nL-SYSTEM / RECURSIVE BOTANICAL STUDY\nGrowth parameters\nLIVE\nIterations\n6 generations\nEach generation adds a little complexity.\nBranch angle\n25°\nThe space between each new possibility.\nWind strength\nBreezy · 71%\nA breeze to keep things moving.\nCURRENT SEED\n08421\n↝   New seed\nGrow again\nSame rules. Endless possibilities.\n6,048\nBRANCH\nSEGMENTS\n4,096\nLEAF\nNODES\n06\nRECURSIVE\nGENERATIONS\nTHE RULE X → F+[[X]−X]−F[−FX]+X   /   F → FF\nBuilt from mathematics. Moved by nature.","images":"attached"}

assistant

Created `index.html` using the provided `p5.min.js`. Features recursive L-system growth, gentle wind animation, adjustable branching and iterations, randomized seeds, pause/regrow controls, and PNG export. Tested the animation and controls in the browser.