How to make objects take the shape of a path?

Question

Adobe Photoshop

Greetings.
123
I have like this:

I want to get like this:

Answer 1

Mmmmm...
1 layer with lock
2 layer 1 figure
3 layer 2 figure
4 layer 3 figure.
Remove the lock, Right-click on the layers - Merge visible, Pen draw on top of the figure, after drawing, right-click, Select area, Ok, the area has become dotted, wait for Del.
So?