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How to code P5 Tutorial (P5)
How to code Three.js Tutorial (Three.js)
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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.

25 countries    1,898 coders    6,724 worlds    351,174 runs    2.3 million lines of code    Update stats

GA (Finnegans Wake)
750 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.
Sheepdog3(Submis...
671 runs ♦ 3 likes
By Neil Geoghegan  
Created: 8 Dec 2016
Modified: 10 Feb 2018
Globe Trotter
1451 runs ♦ 2 likes
By Laura Araviciute  
Created: 3 Dec 2016
Modified: 10 Feb 2018
Blank Three.js World
1297 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.
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 6,730 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
318 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
454 runs ♦ 1 like
By "Coding Train" p...  
Created: 4 Sep 2018
Modified: 4 Sep 2018
Variables in p5.js (mouseX, mouseY)
Tutorial 2.5
118 runs ♦ 1 like
By "Coding Train" p...  
Created: 4 Sep 2018
Modified: 4 Sep 2018
The random() Function
Tutorial 7.3
189 runs ♦ 0 likes
By "Coding Train" p...  
Created: 5 Sep 2018
Modified: 5 Sep 2018
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.

Character recogn...
1434 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...
1736 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
2843 runs ♦ 1 like
By "Coding Train" p...  
Created: 1 May 2019
Modified: 21 Oct 2022
"A Star" algorithm to find shortest path through maze.
GA (Finnegans Wake)
750 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.
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
361 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 18.3
34 runs ♦ 0 likes
By "Coding Train" p...  
Created: 9 Sep 2018
Modified: 9 Sep 2018
Light and Material
Tutorial 18.5
67 runs ♦ 0 likes
By "Coding Train" p...  
Created: 9 Sep 2018
Modified: 2 Jun 2019
Camera and Perspective
Tutorial 18.8
61 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.

Castle World
678 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...
Simple World
1464 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.
Model World
760 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.
MineCraft
935 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...
Zombie Death Baby
648 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...
Password Websock...
28 runs ♦ 0 likes
By Starter user  
Created: 14 Nov 2022
Modified: 15 Nov 2022
Password version of "Websockets boxes"
Complex World
7264 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.
Touch World
397 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...
Websockets boxes
610 runs ♦ 0 likes
By Starter user  
Created: 29 Feb 2020
Modified: 14 Nov 2022
Demo of Websockets in 3D World. Click to change the boxes on the other user's machine, while the...
One Cube World (...
1004 runs ♦ 2 likes
By Starter user  
Created: 11 Apr 2018
Modified: 21 Apr 2021
Simple starter World (Three.js version). Built-in camera control.
Blank Three.js World
1297 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.
User-controlled ...
712 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...
Random Worlds

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

Graphical Breadt...
28 runs ♦ 0 likes
By Sakthi Somaskandan  
Created: 15 Oct 2021
Modified: 16 Oct 2021
Week 4 Exercise to find and fix bugs in the graphical Breadth-first search algorithm
week1.1 One Cube...
18 runs ♦ 0 likes
By Meenu Mathew  
Created: 30 Sep 2021
Modified: 30 Sep 2021
One Cube World (P5)" by Starter user
Blank Three.js W...
33 runs ♦ 0 likes
By Dheera  
Created: 7 Oct 2021
Modified: 7 Oct 2021
Clone of "Blank Three.js World" by Starter user
Cloned Two Playe...
18 runs ♦ 0 likes
By shanan lynch  
Created: 7 Feb 2017
Modified: 10 Feb 2018
Character recogn...
89 runs ♦ 0 likes
By Aishwarya Ramesh  
Created: 18 Nov 2021
Modified: 5 Dec 2021
Doodle Recognition- 21260609
test
37 runs ♦ 0 likes
By ben  
Created: 27 Feb 2018
Modified: 27 Feb 2018
Lab JavaScript U...
30 runs ♦ 0 likes
By MrDheer  
Created: 22 Sep 2022
Modified: 22 Sep 2022
LetsDoIt
Perceptron (clon...
13 runs ♦ 0 likes
By Fergus  
Created: 29 Nov 2020
Modified: 29 Nov 2020
Clone of "Perceptron" by "Coding Train" project
One Cube World (...
45 runs ♦ 0 likes
By Paul R  
Created: 16 Sep 2022
Modified: 16 Sep 2022
Clone of "One Cube World (P5)" by Starter user
A star (clone by...
34 runs ♦ 0 likes
By Adrian Sweeney  
Created: 29 Oct 2019
Modified: 29 Oct 2019
Clone of "A star" by "Coding Train" project


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Call for partners!
Ancient Brain is looking for partners. In particular, we seek a partner in writing a JavaScript coding book for schools, to be used worldwide. We will integrate your course 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.