How do you insert a function within a three js program in the html file to return a mesh representing an n sided polygon. with the function regularPolygonGeometry(n, innerColor, outerColor),

Colors should interpolate from the polygon's center (innerColor) to its perimeter (outerColor).

The polygon should be centered at the origin, lie in the xy-plane, and have radius 2 (i.e., the distance from the origin to each of the polygon's n vertices is equal to 2)