[NTG-context] MP newbie question

Hi, How do you make this work ? --- mpframed.tex --- %\def\myFrameAlternative{line} %\def\myFrameAlternative{dashes} \def\myFrameAlternative{dots} \startuniqueMPgraphic{name} path p ; p := unitsquare xscaled \overlaywidth yscaled \overlayheight ; show (\myFrameAlternative) ; if \myFrameAlternative = dashes : % if (\myFrameAlternative) = dashes : draw p dashed evenly scaled 2 ; % elseif (\myFrameAlternative) = dots : elseif \myFrameAlternative = dots : draw p dashed withdots scaled 2 ; else : draw p ; fi ; \stopuniqueMPgraphic \defineoverlay[myGraphic][\uniqueMPgraphic{name}] \starttext \framed[% offset=5mm, background=myGraphic, frame=off] {mp framed} \stoptext --- context.cmd mpframed -- Alan