Polygon playground

[Dav]

I updated the Polygon SUB, it also can now draw filled polygons if you want.  Just give fillclr~& a color value to use.  If you want the polygon empty (not filled) give the fillclr~& value a 0 instead.  The polygon sides color (borderclr~&) and the polygons fill in color can be different if you want. 

- Dav