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Teaching practicals The AI model
How to code
How to code P5 Tutorial (P5)
How to code Three.js Tutorial (Three.js)
Coding course Coding course II Coding for kids WebGL course AI exercises
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Editor's Choice Multi-user Worlds
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Ancient Brain
Code. Play. Teach. Learn. Research. Demo.

Our goal: To become one of the most fun places in the world to code.

23 countries    1,721 coders    5,273 worlds    287,500 runs    1.7 million lines of code    Update stats

Breadth-first se...
546 runs ♦ 0 likes
By "Coding Train" p...  
Created: 30 Apr 2019
Modified: 15 Dec 2019
Breadth-first search for "Six Degrees of Kevin Bacon".
AI music
117 runs ♦ 0 likes
By Mark Humphrys  
Created: 5 Jan 2020
Modified: 4 Jul 2021
Experiments in auto generating music
Scare the Fishes!
169 runs ♦ 1 like
By Enhanced  
Created: 2 Aug 2018
Modified: 2 Aug 2018
Scare the fishes with your mouse ! If you click they will flee even further away. Includes twea...
Game of Crowns
1927 runs ♦ 2 likes
By Niamh Byrne  
Created: 16 Nov 2016
Modified: 10 Feb 2018
An online coding platform

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


Coders: Make 3D worlds and share them with friends. Clone and edit other people's worlds. Make touch mobile games. Embed your worlds on other sites.
Teachers: Run courses in coding and coding for kids and AI coding. Run programming practicals in 3D or 2D 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.
Enough talk. Show me a video!

OK, here is a high-level introduction.
This does not assume you have ever coded, or ever heard of JavaScript graphics (what is behind this site).

How to code
You can "run" any of the 5,273 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.
Click below to learn how to code on this site. Basically, there is a choice of "libraries" that you can use. Skip the intro, let us decide the library, and go straight to the starter tutorial (with videos):
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 7.8 variant
291 runs ♦ 0 likes
By "Coding Train" p...  
Created: 6 Sep 2018
Modified: 11 Sep 2018
Tutorial 7.8 with music and other uploaded images, including from other users. Click on the images.
Tutorial 2.1
392 runs ♦ 1 like
By "Coding Train" p...  
Created: 4 Sep 2018
Modified: 4 Sep 2018
Variables in p5.js (mouseX, mouseY)
Tutorial 7.3
161 runs ♦ 0 likes
By "Coding Train" p...  
Created: 5 Sep 2018
Modified: 5 Sep 2018
Arrays of Objects
Tutorial 2.5
84 runs ♦ 1 like
By "Coding Train" p...  
Created: 4 Sep 2018
Modified: 4 Sep 2018
The random() Function
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.

Character recogn...
1220 runs ♦ 0 likes
By "Coding Train" p...  
Created: 5 Jul 2019
Modified: 2 Jul 2021
Neural network to do character recognition from image database and from handwriting in real-time.
Breadth-first se...
1185 runs ♦ 0 likes
By "Coding Train" p...  
Created: 30 Apr 2019
Modified: 15 Dec 2019
Breadth-first search with a Force-directed graph.
GA (Finnegans Wake)
610 runs ♦ 0 likes
By "Coding Train" p...  
Created: 2 May 2019
Modified: 15 Dec 2019
Genetic Algorithm to write the first line of Finnegans Wake.
A star
2162 runs ♦ 1 like
By "Coding Train" p...  
Created: 1 May 2019
Modified: 21 Oct 2021
"A Star" algorithm to find shortest path through maze.
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 18.7
346 runs ♦ 0 likes
By "Coding Train" p...  
Created: 9 Sep 2018
Modified: 11 Sep 2018
Tutorial 18.7 with full canvas, resized model, sound. Texture on box is image from another user.
Tutorial 18.5
61 runs ♦ 0 likes
By "Coding Train" p...  
Created: 9 Sep 2018
Modified: 2 Jun 2019
Camera and Perspective
Tutorial 18.3
27 runs ♦ 0 likes
By "Coding Train" p...  
Created: 9 Sep 2018
Modified: 9 Sep 2018
Light and Material
Tutorial 18.8
54 runs ♦ 0 likes
By "Coding Train" p...  
Created: 9 Sep 2018
Modified: 9 Sep 2018
3D Custom Shapes
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.

User-controlled ...
637 runs ♦ 2 likes
By Starter user  
Created: 12 Feb 2017
Modified: 18 Apr 2021
3d model World. User controlled on desktop. Keyboard arrows to move. Switch to "Move with" camer...
Touch World
355 runs ♦ 1 like
By Starter user  
Created: 6 Jan 2018
Modified: 18 Apr 2021
How to override default touch handling. Mobile: Touch drag moves agent, touch pinch zooms camera...
One Cube World (...
907 runs ♦ 2 likes
By Starter user  
Created: 11 Apr 2018
Modified: 21 Apr 2021
Simple starter World (Three.js version). Built-in camera control.
MineCraft
845 runs ♦ 2 likes
By Starter user  
Created: 27 Nov 2016
Modified: 4 Jul 2021
Use keyboard to draw blocks like in MineCraft. Use arrow keys and PgUp, PgDn to draw. Can save w...
Websockets boxes
257 runs ♦ 0 likes
By Starter user  
Created: 29 Feb 2020
Modified: 4 Jul 2021
Demo of Websockets in 3D World. Click to change the boxes on the other user's machine, while the...
Blank Three.js World
1155 runs ♦ 2 likes
By Starter user  
Created: 20 Nov 2016
Modified: 18 Apr 2021
A simple starter World. An Array of spheres. Painted with textures. Random motion.
Zombie Death Baby
561 runs ♦ 1 like
By Starter user  
Created: 11 Jun 2018
Modified: 4 Jul 2021
How to make a fun touch game for mobile. Touch drag and tap objects. Mouse drag and click object...
Castle World
624 runs ♦ 4 likes
By Starter user  
Created: 11 Nov 2016
Modified: 4 Jul 2021
Demo of how to insert 3d model into World. Mind-controlled agent, actively-pursuing enemy. Splas...
Complex World
6593 runs ♦ 3 likes
By Starter user  
Created: 1 Oct 2016
Modified: 18 Apr 2021
World with a Mind-controlled agent, actively-pursuing enemy, random maze, skybox, music.
Model World
673 runs ♦ 2 likes
By Starter user  
Created: 8 Nov 2016
Modified: 18 Apr 2021
Demo of how to insert 3d models into World. Mind-controlled agent, actively-pursuing enemy. Skybox.
Simple World
1371 runs ♦ 2 likes
By Starter user  
Created: 1 Oct 2016
Modified: 18 Apr 2021
Simple World with a Mind-controlled agent, randomly-moving enemy, paint blocks with texture.
Random Worlds

Here are some random Worlds that have had more than 10 runs. Reload for more.

Cloned multiple ...
42 runs ♦ 0 likes
By test  
Created: 26 Aug 2017
Modified: 10 Feb 2018
Agent and Enemy ...
124 runs ♦ 0 likes
By Prateek Bhargava  
Created: 28 Nov 2020
Modified: 29 Nov 2020
Implementation of A* algorithm into the enemy's behavior, within Complex world. The path decided...
Castle World (cl...
30 runs ♦ 0 likes
By grey  
Created: 26 Jun 2019
Modified: 26 Jun 2019
Clone of "Castle World" by Starter user
Plain canvas web...
54 runs ♦ 0 likes
By Starter user  
Created: 1 Sep 2018
Modified: 18 Apr 2021
Example of porting webgl World (almost) unchanged to AB using plain canvas API
2.89 renew
30 runs ♦ 0 likes
By tuitef2  
Created: 8 Mar 2019
Modified: 8 Mar 2019
Clone of " Mikey Dowling 2.89 Ai capture egg speed adjustment/capping" by Mikey Dowling
One Cube World (...
17 runs ♦ 0 likes
By Radwan Duadu  
Created: 25 Oct 2020
Modified: 25 Oct 2020
Clone of "One Cube World (P5)" by Starter user
AI_Practical2_
42 runs ♦ 0 likes
By Khizer Ahmed  
Created: 5 Dec 2021
Modified: 9 Jan 2022
Character recognition neural network - Practical Exercise by Khizer
Pokemon Chase 2:...
870 runs ♦ 0 likes
By StevenMacManus  
Created: 19 Nov 2020
Modified: 26 Nov 2020
Modified "Pokemon Chase (Basic)" by StevenMacManus
Ported Neural Ne...
27 runs ♦ 0 likes
By Dom  
Created: 11 Dec 2019
Modified: 16 Dec 2019
Ported Neural Network - DC
Cloned Pacman In...
16 runs ♦ 0 likes
By Simon Lowry  
Created: 11 Dec 2016
Modified: 10 Feb 2018


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