# This models some hostile script.  We will allow it to run the first time
# and then only when n is changed is the scientist warned that the 
# script has changed.

n=4

randomSeed(5334)
from org.das2.graph import Painter
class BlurPainter( Painter ):
    def paint( self, g ):
       c= g.background
       g.color= Color( c.red,c.green,c.blue,200 )
       w= 1000
       h= 1000
       for i in xrange(0,h,10):
           i=i + int(rand()*10)
           g.drawLine(0,i,w,i)
           g.drawLine(0,i+1,w,i+1)

dom.canvases[0].controller.dasCanvas.addTopDecorator(BlurPainter())