How to drag a shape along a given path?

You didn't specify exactly how you want the interaction to work, so I used what feels most natural to me.

A circle object has an x,y coordinate for its center, and a radius. To make sure the circle remains on the line, simply find the intersection of the center of the circle and the line itself.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.