Why there must be that ' -mark in front of draw functions?

        append plot reduce [
            'fill-pen ((r * (1.0.0)) + (g * (0.1.0)) + (b * (0.0.1)))
            'polygon  xy xy0 xy1 xy2 xy
        ]

What does it mean?
-- 
To unsubscribe from the list, just send an email to 
lists at rebol.com with unsubscribe as the subject.

Reply via email to