Animating a shape morphing along a path

Just wondering if anyone knows a way to animate a shape transforming along a curve. Not moving along a path, like a ribbon growing along a path.

I moved this to a more appropriate place.

so what is it exactly you want to do?

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To animate a pencil drawing a line or a ribbon that ties itself into a knot in Max you can grow an object along a path and add more vertices etc just wondering if a similar thing was possible

there is the “build” effect which might be what you need.