Write a function to create a movie where one item is moving from the left to the right and another item is moving from the right to the left.

Question

What will be an ideal response?

Answer 1

```
def movingRectangle4(directory):
for num in range (1 ,30): #29 frames
canvas = makeEmptyPicture (300 ,250)
#add a filled rect moving linearly
addRectFilled(canvas,num*8,0,50,50,red)
addRectFilled(canvas,250-num*8 ,0,50,50,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
```