Write a function to create a movie where one item is moving from the top to the bottom and another item is moving from the bottom to the top.
What will be an ideal response?
```
def movingRectangle3(directory):
for num in range (1 ,30): #29 frames
canvas = makeEmptyPicture (300 ,250)
#add a filled rect moving linearly
addRectFilled(canvas,0,num*7,50,50,red)
addRectFilled(canvas,0 ,200-num*7 ,50,50,blue)
# Now , write out the frame
# Have to deal with single digit vs. double digit
numStr=str(num)
if num < 10:
writePictureTo ( canvas , directory +"//frame0"+ numStr +".jpg")
if num >= 10:
writePictureTo ( canvas , directory +"//frame"+ numStr +".jpg")
movie = makeMovieFromInitialFile(directory+"//frame00.jpg");
return movie
```
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