Drag MC along custom Path

[COLOR=#333333]I guess at the end of the day… the best example of what I want would be a bead on a string. I want a bead to be dragged along the string no matter the shape the string makes… How can I do this. I was thinking of using math functions but that would be to uniform… if you know what I mean - I don’t want perfect conics and curves. Thanks for your help, think you can help me with this? I want to be able to draw the paths.

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