Draw an adjustable Trapezoid in Livecode - How to change x, y of the 4 corner points of a rect
Maybe this could be useful:
set the style of it to polygon
set the points of it to "3,0,0,10,10,10,7,0,3,0"
-- a very small figure
set the rect of it to "0,0,200,100"
-- enlarge the figure
set the loc of it to the screenloc
-- position it in a place easy to find