Fractal Plant

• Variables: X, F
• Constants: +, -
• Start: X
• Productions: X = F-[[X]+X]+F[+FX]-X, F = FF
• Let F be a forward move, - be 25 degrees left, + be 25 degrees right
• An opening bracket ("[") means "save the current state of the turtle
• A closing bracket ("]") means "restore the state of the turtle from the corresponding opening bracket"