Target moves depending on user input (DE2 switches)

BUGS: (TO - DO)

1. Target icon is also a duck
2. Leaves a trail behind while moving up or left
3. Exits the screen from left and up (not sure about down)
4. Leaves a trail behind while moving at speeds greater than 1
5. 1st column of image reads background color of last column (or column
after last) of image
6. Leaves a trail behind by taking previous images last bit at 1st bit
of new image.