I’ve attached an example. The first one is showing how it works. The second one is exactly the same but I broke apart the pieces so it’s a little easier to see what is happening. The third is exactly the same as the first but with one more piece to make it look more like your sketch.
Imagine if you had 4 pieces of paper like those shapes, how would you stack and move them to create the effect you’re looking for? That’s basically all I did. Just a simple illusion.
This is in Axure 8. You can’t do it in Axure 7 without a lot of frustration.
Untitled.rp (62.5 KB)