Grad

import appuifw as A
import graphics

run=1
def stop():
 global run
 run=0

A.app.screen='full'
A.app.body=c=A.Canvas()
A.app.exit_key_handler=stop
w,h=c.size
img=graphics.Image.new((w,h))


def grad():
 for i in xrange(h):
  img.line((0,i,w,i),(0,i,0))

while run:
 grad()
 c.blit(img)
 A.e32.ao_sleep(1e-04)