\starttext

    \startuniqueMPgraphic{mytest}
        fill OverlayBox withcolor green ;
        draw textext("nested") xsized 8cm shifted center OverlayBox withcolor blue ;
        draw fullcircle scaled bbwidth(OverlayBox) withcolor red ;
    \stopuniqueMPgraphic

    \defineoverlay[mytest][\uniqueMPgraphic{mytest}]

    \startMPpage[offset=1pt]
        fill fullcircle scaled 10cm withcolor red ;
        draw textext("\framed[background=mytest]{bla}") ;
        draw textext("test 1.1") xsized 8cm rotated  45 withcolor white/2 ;
        draw textext("test 1.2") xsized 4cm rotated -45 withcolor white/4 ;
    \stopMPpage

    \startMPpage[offset=1pt]
        fill fullcircle scaled 10cm withcolor red ;
        draw textext("\framed[background=mytest]{bla bla}") ;
        draw textext("test 2.1") xsized 8cm rotated  45 withcolor white/1  ;
        draw textext("test 2.2") xsized 4cm rotated -45 withcolor white/2  ;
        draw textext("test 2.1") xsized 6cm rotated -30 withcolor white/3  ;
        draw textext("test 2.2") xsized 4cm rotated  30 withcolor white/4  ;
    \stopMPpage

\stoptext
