Digital Workshop

I am having a problem with SetFillColour().
I am trying to get a polygon to accept a Linear effect angled to 90 degrees with a graduated colour and thus I have the script:
var progress=new Object()
progress.style="Linear"
progress.angle=90
progress.colour=new Array()
progress.colour[0]=RGB(20,20,20)
progress.colour[1]=RGB(200,200,200)
BAR.SetLineColour(progress)
However all I get in the polygon called BAR is a black fill. Can anyone tell me where I am going wrong

SetFillColour() and SetLineColour() only accept a single colour (and an optional transparency).

SetBackground() can take the more advanced parameters but that applies to graphical objects (frames, images, the container vector shape), not individual polygons.