Just draw a lot of random squares in the screen.
from kandinsky import fill_rect;from random import choice,randint as r;X,Y,C=160,111,[(0,255,0),(255,0,0),(0,0,255),(255,255,0)] O=5 while 1: a=r(0,3) O=r(1,10) if a==0 and X>0:X-=1*O elif a==1 and Y>0:Y-=1*O elif a==2 and Y<222:Y+=1*O elif a==3 and X<320:X+=1*O # X,Y=(abs(X+r(-1,1)))%320,(abs(Y+r(-1,1)))%222 fill_rect(X,Y,O,O,C[a])