The game of life. Instructions: 1. Turbo mode (shift-left click green flag) 2. Select size of square (5,10,15,20) 3. Watch Rules: A square has 8 neighbours, e.g. the centre square of a 3x3 has the neighbours of the other 8 squares. If a square has either less than 2 or more than 3 lit neighbours, they die from starvation or overcrowding. If an unlit square has exactly 3 lit neighbours, it is lit up.
Credit to Conway for the original idea. I did all the programming. 10 is best in my opinion 1s1s slower version: http://scratch.mit.edu/projects/18769055/