This step has 2 parts.
First, you will need to make the "floor". This is to hold in the candy, but still leave an opening for the candy to fall through. You can see this in pictures 1-6. In picture 7 I showed how to attach it on the bottom.
Part 2 is the part that makes sure no candy gets let behind. It slants so the candy will fall toward the opening. I used slanted pieces stacked on top of each other to achieve this effect. You can see how I built it in pictures 8-13.