I am trying to mask [rectangle] using GEM with another smaller [rectangle] (that controls the first rectangle's alpha value wherever it is placed) in order to create an adjustable rectangle outline (that has a border of my desired thickness).  I noticed that you can choose [draw line( and [width $1( for a rectangle but the maximum thickness of the line is much too small.  Does anyone have any thoughts or ideas?

Or maybe there's an object like [disk] (using 4 segments) but with the ability to adjust the height and width just like [rectangle] 

Cheers!

Ryan