\setupcolors[state=start]
\setuppapersize[S6][S6]
\setuplayout [width=fit,
rightmargin=0cm,
leftmargin=0cm,
leftmargindistance=0pt,
rightmargindistance=0pt,
height=fit,
topspace=0cm,
header=0pt,
footer=0cm,
bottomspace=0cm,
backspace=0cm,
location=singlesided]

\definecolor[Orange][r=1.,g=.47,b=.0] % dark orange
\setupinteractionscreen[option=max]

\startbuffer[sometext]
\switchtobodyfont[sansserif,1.0cm]
\midaligned{\white \bf This is the text}
\stopbuffer

\starttext

\startuseMPgraphic{somebackground}
   fill fullsquare
       scaled 10cm
       withcolor .625red ;
   fill fullsquare
       scaled 10cm
       shifted (10cm,0)
       withcolor black ;
   fill fullsquare
       scaled 10cm
       shifted (20cm,0)
       withcolor \MPcolor{Orange} ;
   currentpicture := currentpicture xysized(OverlayWidth+.5pt,OverlayHeight+.5pt) ;
\stopuseMPgraphic

\startuseMPgraphic{somecolorcircle}
   colorcircle(2cm,white,.625red,\MPcolor{Orange}) ;
\stopuseMPgraphic

\startTEXpage


\definelayer[somelayer]%[width=600pt,height=450pt]

\setlayer[somelayer]
{\useMPgraphic{somebackground}}

\setlayer[somelayer][x=9.6cm,y=7.5cm]
{\useMPgraphic{somecolorcircle}}

\setlayer[somelayer][y=6cm]
{\getbuffer[sometext]}

\flushlayer[somelayer]

\stopTEXpage

\stoptext