static in jython

static.py

from java.awt import Color
from javax.swing import JFrame
from java.awt.image import BufferedImage
from java.util import Random
from java.lang import Thread


def getBackground(WIDTH,HEIGHT,size):
  rand=Random()
  background = BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB)
  bg2=background.getGraphics()
  for x in range(0,WIDTH,size):
    for y in range(0,HEIGHT,size):
        r=rand.nextInt(255)
        color=Color(r,r,r)
        bg2.setColor(color)
        bg2.fillRect(x,y,size,size)
  return background


WIDTH=800
HEIGHT=600
size=6
a=JFrame()
a.setSize(WIDTH, HEIGHT)
a.setResizable(False)
a.setVisible(True)
a.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
gr = a.getGraphics()


while True:
  bg=getBackground(WIDTH,HEIGHT,size)
  gr.drawImage(bg, 0, 0, None)
  Thread.sleep(1000/60)