# Turn all mostly-red pixels blue ("mostly=red" means within a distance of 140 of red)
def redToBlue (pic):
  for p in getPixels (pic):
    if distance (getColor (p), red) < 140:
      setColor (p, blue)
      
# turn bottom-right corner of a picture (100x100 pixels) white
def whiteCorner (pic, size):
  for x in range (getWidth(pic) - size, getWidth(pic)):
    for y in range (getHeight(pic) - size, getHeight(pic)):
      p = getPixelAt(pic, x, y)
      setColor (p, white)   

# Shift all samples in a sound "up" by 32767
def upShift (sound):
  for s in getSamples(sound):
    value = getSampleValue (s)
    setSampleValue (s, value + 32767)
    
# Cut the frequency of a sound in half (double its length so it sounds "lower")
def halveFrequency (sound):
  target = makeEmptySound (getLength (sound) * 2)
  targetIndex = 0
  for s in getSamples (sound):
    value = getSampleValue (s)
    setSampleValueAt (target, targetIndex, value)
    setSampleValueAt (target, targetIndex+1, value)
    targetIndex = targetIndex + 2
  return target  

# Count from 0 to 100 by 5s
def countAndPrint ():
  for i in range (0, 101, 5):
    print i
    
# Print a line of 10 hellos, a line of 9 hellos, ..., a line of 1 hello
def helloThere():
  for i in range (11, 1, -1):
    for j in range (1, i):
      print "hello",
    print