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Ancient Brain
Code. Play. Teach. Learn. Research. Demo.

An online coding and hosting platform for everyone.

34 countries    2,158 coders    9,346 worlds    508,553 runs    3.2 million lines of code    Update stats

Binary tree
3196 runs ♦ 0 likes
By "Coding Train" p...  
Created: 25 Apr 2019
Modified: 17 Sep 2023
Binary tree search demo.
One Cube World (...
1114 runs ♦ 2 likes
By Starter user  
Created: 11 Apr 2018
Modified: 17 Sep 2023
Simple starter World (Three.js version). Built-in camera control.
Text-to-speech "...
9 runs ♦ 0 likes
By Sam Murphy  
Created: 1 Dec 2023
Modified: 4 Feb 2024
Test of two APIs: (1) Test of OpenAI GPT API. Hard-coded prompt. Clone and Edit "messages" data ...
Simple World
1652 runs ♦ 2 likes
By Starter user  
Created: 1 Oct 2016
Modified: 17 Sep 2023
Simple World with a Mind-controlled agent, randomly-moving enemy, paint blocks with texture.
An online coding platform

Ancient Brain is an online coding and hosting platform for everyone.
See Introduction and List of features.


Coders: Make 3D worlds and share them with friends. Clone and edit other people's worlds. Make multi-user games and environments. Make touch mobile games. Upload your own images, music and 3D models. Embed your worlds on other sites.
Teachers: Run courses in coding and coding for kids and AI coding. Run programming practicals in 3D graphics or 2D graphics or text, with many features designed for teachers. Safely edit and run student code.
Learners: Do courses in coding and coding for kids and AI coding. Clone other people's worlds and change one or two lines. What's the worst that could happen?
Gamers: Play the endless game worlds the coders make. Come and browse an ever-growing archive of games.
Researchers: Upload problems, tender for solutions, test and rank them. Make hybrid AI systems from the code of multiple authors.
Getting started
You can "run" any of the 9,346 programs or "Worlds" by clicking on them. But this is also a coding site, where you can code your own Worlds. You can use this site to learn to code. Or show off your creations if you are an experienced coder.
Basically you can read more about how to get started running Worlds and coding: Or you can leap straight into coding with our starter tutorial:
Programming course

Ancient Brain has a course in how to program from scratch.
You will get to make "Worlds" like the following. Click on them to run them.

Tutorial 2.5
164 runs ♦ 1 like
By "Coding Train" p...  
Created: 4 Sep 2018
Modified: 17 Sep 2023
The random() Function
Tutorial 7.8 variant
369 runs ♦ 0 likes
By "Coding Train" p...  
Created: 6 Sep 2018
Modified: 17 Sep 2023
Tutorial 7.8 with music and other uploaded images, including from other users. Click on the images.
Tutorial 2.1
548 runs ♦ 1 like
By "Coding Train" p...  
Created: 4 Sep 2018
Modified: 17 Sep 2023
Variables in p5.js (mouseX, mouseY)
Tutorial 7.3
226 runs ♦ 0 likes
By "Coding Train" p...  
Created: 5 Sep 2018
Modified: 17 Sep 2023
Arrays of Objects
AI course

Ancient Brain has a set of AI programming exercises, with videos and notes. For use in any AI course.
You will get to modify "Worlds" like the following. Click on them to run them.

GA (Finnegans Wake)
1006 runs ♦ 0 likes
By "Coding Train" p...  
Created: 2 May 2019
Modified: 17 Sep 2023
Genetic Algorithm to write the first line of Finnegans Wake.
Character recogn...
1817 runs ♦ 0 likes
By "Coding Train" p...  
Created: 5 Jul 2019
Modified: 17 Sep 2023
Neural network to do character recognition from image database and from handwriting in real-time.
A star
3989 runs ♦ 1 like
By "Coding Train" p...  
Created: 1 May 2019
Modified: 17 Sep 2023
"A Star" algorithm to find shortest path through maze.
Breadth-first se...
2790 runs ♦ 0 likes
By "Coding Train" p...  
Created: 30 Apr 2019
Modified: 17 Sep 2023
Breadth-first search with a Force-directed graph.
WebGL course

Ancient Brain has a short course in JavaScript 3D graphics ("WebGL") programming.
You will get to make "Worlds" like the following. Click on them to run them.

Tutorial 18.3
63 runs ♦ 0 likes
By "Coding Train" p...  
Created: 9 Sep 2018
Modified: 17 Sep 2023
Light and Material
Tutorial 18.5
91 runs ♦ 0 likes
By "Coding Train" p...  
Created: 9 Sep 2018
Modified: 17 Sep 2023
Camera and Perspective
Tutorial 18.8
90 runs ♦ 0 likes
By "Coding Train" p...  
Created: 9 Sep 2018
Modified: 17 Sep 2023
3D Custom Shapes
Tutorial 18.7
411 runs ♦ 0 likes
By "Coding Train" p...  
Created: 9 Sep 2018
Modified: 17 Sep 2023
Tutorial 18.7 with full canvas, resized model, sound. Texture on box is image from another user.
Starter Worlds for Three.js

These are the main "Starter Worlds" that use the Three.js library (which tends to give the most advanced graphics).

You can Clone and Edit all of these and change their code. Look for a section at the top called the "Tweaker's Box". This contains the easiest things to change.

Touch World
457 runs ♦ 1 like
By Starter user  
Created: 6 Jan 2018
Modified: 17 Sep 2023
How to override default touch handling. Mobile: Touch drag moves agent, touch pinch zooms camera...
Simple World
1652 runs ♦ 2 likes
By Starter user  
Created: 1 Oct 2016
Modified: 17 Sep 2023
Simple World with a Mind-controlled agent, randomly-moving enemy, paint blocks with texture.
MineCraft
1117 runs ♦ 2 likes
By Starter user  
Created: 27 Nov 2016
Modified: 17 Sep 2023
Use keyboard to draw blocks like in MineCraft. Use arrow keys and PgUp, PgDn to draw. Can save w...
Websockets boxes
804 runs ♦ 0 likes
By Starter user  
Created: 29 Feb 2020
Modified: 17 Sep 2023
Demo of Websockets in 3D World. Click to change the boxes on the other user's machine, while the...
Zombie Death Baby
771 runs ♦ 1 like
By Starter user  
Created: 11 Jun 2018
Modified: 17 Sep 2023
How to make a fun touch game for mobile. Touch drag and tap objects. Mouse drag and click object...
Password Websock...
67 runs ♦ 0 likes
By Starter user  
Created: 14 Nov 2022
Modified: 17 Sep 2023
Password version of "Websockets boxes"
One Cube World (...
1114 runs ♦ 2 likes
By Starter user  
Created: 11 Apr 2018
Modified: 17 Sep 2023
Simple starter World (Three.js version). Built-in camera control.
User-controlled ...
927 runs ♦ 2 likes
By Starter user  
Created: 12 Feb 2017
Modified: 17 Sep 2023
3d model World. User controlled on desktop. Keyboard arrows to move. Switch to "Move with" camer...
Model World
856 runs ♦ 2 likes
By Starter user  
Created: 8 Nov 2016
Modified: 17 Sep 2023
Demo of how to insert 3d models into World. Mind-controlled agent, actively-pursuing enemy. Skybox.
Blank Three.js World
1514 runs ♦ 2 likes
By Starter user  
Created: 20 Nov 2016
Modified: 17 Sep 2023
A simple starter World. An Array of spheres. Painted with textures. Random motion.
Complex World
8222 runs ♦ 5 likes
By Starter user  
Created: 1 Oct 2016
Modified: 17 Sep 2023
World with a Mind-controlled agent, actively-pursuing enemy, random maze, skybox, music.
Castle World
786 runs ♦ 4 likes
By Starter user  
Created: 11 Nov 2016
Modified: 17 Sep 2023
Demo of how to insert 3d model into World. Mind-controlled agent, actively-pursuing enemy. Splas...
Random Worlds

Here are some random Worlds that have had more than 30 runs. Reload for more.

World2.0
553 runs ♦ 0 likes
By tuitef2  
Created: 2 Mar 2019
Modified: 17 Sep 2023
A star (clone by...
33 runs ♦ 0 likes
By Ireneo Mercado  
Created: 31 Oct 2023
Modified: 4 Nov 2023
Clone of "A star" by "Coding Train" project
second test
58 runs ♦ 0 likes
By Sagar Ramachandr...  
Created: 4 Dec 2021
Modified: 17 Sep 2023
Clone of "Character recognition neural network" by "Coding Train" project
New World
34 runs ♦ 0 likes
By arpit  
Created: 11 Nov 2022
Modified: 17 Sep 2023
Minecraft Trapper
395 runs ♦ 0 likes
By Paul McBrien  
Created: 29 Oct 2021
Modified: 17 Sep 2023
clone of maze world
Takeshi-ish
640 runs ♦ 0 likes
By Shunta Minaguchi  
Created: 7 Dec 2016
Modified: 17 Sep 2023
Space hero in th...
34 runs ♦ 0 likes
By Mathias Bazin  
Created: 7 Jun 2018
Modified: 17 Sep 2023
Adapted the game to fit the threeworld object. Add audio and visual feedback through the game an...
Donald (Default)
77 runs ♦ 0 likes
By anish kumar  
Created: 22 Nov 2020
Modified: 17 Sep 2023
Donald (Default)
Complex World (c...
67 runs ♦ 0 likes
By joe  
Created: 9 Nov 2023
Modified: 9 Nov 2023
Clone of "Complex World (clone by joe) (clone by joe) (clone by joe)" by joe
Binary tree (clo...
70 runs ♦ 0 likes
By Jack O'Brien  
Created: 24 Oct 2020
Modified: 17 Sep 2023
Clone of "Binary tree"


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Call for partners!
Ancient Brain is looking for a partner to co-write a JavaScript coding book for schools, to be used worldwide. This would be a course for students in learning to code from scratch. The book and course will be integrated into the Ancient Brain site. This is an opportunity for someone looking to develop a course and textbook to partner with a site to promote it. Read more.