Introduction Features
Definitions How to run Worlds
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
Starter Worlds
Editor's Choice Multi-user Worlds
P5 Editor Worlds Coding Train Worlds AI Worlds Random 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.

22 countries    1,618 coders    4,070 worlds    224,041 runs    1.3 million lines of code    Update stats

Blank Three.js World
1054 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.
Purple Fruit Monster
145 runs ♦ 1 like
By Starter user  
Created: 1 Sep 2018
Modified: 30 Jun 2021
Example of porting physics World unchanged to AB using plain physics API. From "3D Game Programm...
XOR multi-layer ...
274 runs ♦ 0 likes
By "Coding Train" p...  
Created: 3 Jul 2019
Modified: 15 Dec 2019
Neural network to do XOR.
Sampler
121 runs ♦ 1 like
By Enhanced  
Created: 19 Jul 2018
Modified: 19 Jul 2018
Upload sounds, play them, automate them. Saving data works.
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 4,070 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 7.3
143 runs ♦ 0 likes
By "Coding Train" p...  
Created: 5 Sep 2018
Modified: 5 Sep 2018
Arrays of Objects
Tutorial 2.1
347 runs ♦ 1 like
By "Coding Train" p...  
Created: 4 Sep 2018
Modified: 4 Sep 2018
Variables in p5.js (mouseX, mouseY)
Tutorial 2.5
68 runs ♦ 1 like
By "Coding Train" p...  
Created: 4 Sep 2018
Modified: 4 Sep 2018
The random() Function
Tutorial 7.8 variant
279 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.
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.

Breadth-first se...
871 runs ♦ 0 likes
By "Coding Train" p...  
Created: 30 Apr 2019
Modified: 15 Dec 2019
Breadth-first search with a Force-directed graph.
A star
1421 runs ♦ 1 like
By "Coding Train" p...  
Created: 1 May 2019
Modified: 15 Dec 2019
"A Star" algorithm to find shortest path through maze.
GA (Finnegans Wake)
541 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.
Character recogn...
802 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.
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
22 runs ♦ 0 likes
By "Coding Train" p...  
Created: 9 Sep 2018
Modified: 9 Sep 2018
Light and Material
Tutorial 18.5
57 runs ♦ 0 likes
By "Coding Train" p...  
Created: 9 Sep 2018
Modified: 2 Jun 2019
Camera and Perspective
Tutorial 18.8
45 runs ♦ 0 likes
By "Coding Train" p...  
Created: 9 Sep 2018
Modified: 9 Sep 2018
3D Custom Shapes
Tutorial 18.7
325 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.
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.

Websockets boxes
242 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...
MineCraft
775 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...
Complex World
4145 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
636 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.
Blank Three.js World
1054 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.
Simple World
1319 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.
One Cube World (...
862 runs ♦ 2 likes
By Starter user  
Created: 11 Apr 2018
Modified: 21 Apr 2021
Simple starter World (Three.js version). Built-in camera control.
Zombie Death Baby
513 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
571 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...
User-controlled ...
562 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
338 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...
Random Worlds

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

My cube world
11 runs ♦ 0 likes
By Andrew Merrigan  
Created: 1 Oct 2019
Modified: 1 Oct 2019
My first world
Ammo for AB
55 runs ♦ 0 likes
By Starter user  
Created: 19 Apr 2021
Modified: 19 Apr 2021
Ammo world for AB API
Cloned Globe Trotter
27 runs ♦ 0 likes
By Jack  
Created: 26 May 2018
Modified: 26 May 2018
Clone of "Globe Trotter" by Laura Araviciute
Lesson 2
15 runs ♦ 0 likes
By Phil McMahon  
Created: 19 May 2019
Modified: 19 May 2019
Lesson 2
One Cube World (...
42 runs ♦ 0 likes
By barry  
Created: 5 Oct 2019
Modified: 5 Oct 2019
Clone of "One Cube World (P5)" by Starter user
One Cube World (...
11 runs ♦ 0 likes
By Deniss Strods  
Created: 7 Oct 2020
Modified: 7 Oct 2020
Clone of "One Cube World (P5)" by Starter user
PongLand
160 runs ♦ 0 likes
By Michael Ryan  
Created: 30 Sep 2019
Modified: 1 Oct 2019
Left player uses 'w' and 's', Right player uses arrow keys
Cloned <b> Compl...
11 runs ♦ 0 likes
By Ray Walshe  
Created: 5 Mar 2018
Modified: 5 Mar 2018
New World
60 runs ♦ 0 likes
By xMarvin  
Created: 22 Nov 2019
Modified: 22 Nov 2019
Football Model World
734 runs ♦ 0 likes
By Kieran Turgoose  
Created: 5 Dec 2016
Modified: 10 Feb 2018


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