new twoPictures marking scheme:

10 marks for specification
5 marks height and width if statements
2 marks makeEmptyPicture values
3 marks fill in values for first for
5 marks ySetter if condition
3 marks fill in values for second for
7 marks blocks of code for changing target picture
5 marks whichPicture if condition

40 total
Submit only the file A2revisedQ2.py

new Q3 marking scheme:
3a: 10
3b: 4 for condition 1 for each variable
3c: 5 marks length computation
    5 marks copy 
3d: 2 marks range for i
    1 mark each correct get (4)
    2 marks for each correct set (4)
3e: either:
    2 marks correct use of clip
    2 marks correct use of reverseSound
    3 marks correct copy included
    3 marks correct reverseSound included
    or:
    2 marks correct loop setup
    4 marks correct coordinate math for reversing
    4 marks correctly copy onto target