- Green/t: Represents trees.
- Red/b: Represents fire.
- Black/x: Represents an empty square.
- If a sqaure is burining it will become empty in the next iteration.
- If a square is empty it has a chance to become a tree.
- If a tree touches fire in any 8 neighbouring squares it burns.
- Any tree can randomly burn, even if it is not touching fire.