# Now we'll write a program that actually manipulates
#an image.  Let's change four pixels in the center
#of the image we get to be white, and save the result.
#This will use a number of different functions included
#in JEs for manipulating pictures and pixels.
def setCenterWhite():
  f=pickAFile()
  pic=makePicture(f)
  height=getHeight(pic)
  width=getWidth(pic)
  px1=getPixel(pic,width/2,height/2)
  #a Pixel is a special kind of object in
  #JES.  Let's print the information about
  #the pixel so that we understand what kind
  #of data it contains:
  print px1
  px2=getPixel(pic,width/2+1,height/2)
  px3=getPixel(pic,width/2,height/2+1)
  px4=getPixel(pic,width/2+1,height/2+1)
  setColor(px1,white)
  setColor(px2,white)
  setColor(px3,white)
  setColor(px4,white)
  show(pic)
  writePictureTo(pic,"/Users/straubin/home/CS074-09/newpic.bmp")