> Am 22.11.2014 um 21:32 schrieb John Kitzmiller <kitz@inradius.net>:
> 
> Given rectangles with text:
> 
> \starttext
> Before:\\
> \startMPcode
>   draw unitsquare xscaled 2cm yscaled 1cm;  
> \stopMPcode
> \\
> After:\\
> \startMPcode
>   for i=0 upto 1:
>     draw unitsquare scaled 1cm xshifted i*cm;
>   endfor;
> \stopMPcode
> \stoptext
> 
> How can a line be drawn connecting the right edges of the rectangles? I have played with:
> 
> \startuniqueMPgraphic{line}
>   path a;
>   a:=(0,0)--(0,3cm);
>   draw a withpen pencircle scaled 3pt withcolor green;
> \stopuniqueMPgraphic
> 
> \defineoverlay[line][{\uniqueMPgraphic{line}}]
> 
> and using it in \framed, but placing the line correctly is elusive.

Look at chapter 5 in the metafun manual.

Wolfgang