% Create a rectangle of the full size
a := origin -- (\MPvar{width}, 0mm);
% Randomize it a bit
-%b := a randomized (\overlaywidth / 25) ;
+b := a randomized (\overlaywidth / 25) ;
% And draw it
drawoptions (withpen pencircle scaled .75mm withcolor black) ;
-draw a;
+draw b;
\stopuseMPgraphic
% Draw a line with the given options. Accepts only the 'width' option. Be