mag=1
uro=8
kih=0
bs=uro*mag
fs=(obj.frame+kih)%bs
sy=obj.h/mag
sx=obj.w/uro
x0,x1=0,sx
y0,y1=0,sy
xb0,xb1=(fs%uro)*sx,(fs%uro)*sx+sx
yb0,yb1=math.floor(fs/uro)*sy,math.floor(fs/uro)*sy+sy
obj.drawpoly(x0,y0,0 , x1,y0,0 , x1,y1,0 , x0,y1,0 , xb0,yb0 , xb1,yb0 , xb1,yb1 , xb0,yb1 , 1)