程序生成树木生长！从幼苗到大树，宛如模拟生命过程

展示了程序生成的树木生长过程 —— 从幼苗萌发，到枝干逐步扩展，再一步步长成大树，仿佛让人亲眼见证了生命过程的模拟。

axiom = ‘-F+++FX+F’;

rule(1).before = ‘F’;

rule(1).after = ‘G[+FX]Y[-FZ]’;

rule(2).before = ‘G’;

rule(2).after = ‘GG’ ;

rule(3).before = ‘X’;

rule(3).after = ‘F[F[+Y]][-Y]-X’ ;

rule(4).before = ‘Y’;

rule(4).after = ‘G[+Y][-Y]’ ;

rule(5).before = ‘Z’;

rule(5).after = ‘G[-ZX][+ZX]’ ;

(reddit:sudhabin)