two polygons share two vertices in impoly

I am going to draw some polygon with the shared vertices in the way that all polygons share one or more vertices. means that when I move a shared vertex all polygons reshape. How can I do that? I used impoly to draw polygons.

thanks,

I don't see a question yet.

Perhaps make a small example with some code? It should show what you have so far, and then you can explain what you want to do next.

I am going to draw some polygon with the shared vertices in the way that all polygons share one or more vertices. means that when I move a shared vertex all polygons reshape. How can I do that? I used impoly to draw polygons.

thanks,