I used SMA to create a linear motion between 2 cut-out paper on a piece of cardboard (These illustrations aren’t mine! They are from freepik).

I had trouble increasing the wire’s movement but then I found out my battery was dying. With a new battery, the different levels of movement when I changed the number in analogWrite were pretty drastic. The video below features 3 different analogwrite:

Process:

Cut out the boy and the girl.

Cut out an area of the cardboard so that the figures can move toward each other. I later decided to lock the boy in one place so that only the girl moves.

And here’s the (not so pretty) back!