\starttext
\startMPcode
drawoptions(withpen pencircle scaled .25pt withcolor .5white) ;
draw hlingrid(0, 20, .2, 20cm, 10cm) ;
draw vloggrid(0, 10, .5, 10cm, 20cm) ;
drawoptions(withpen pencircle scaled .50pt) ;
draw hlingrid(0, 20, 1, 20cm, 10cm) ;
draw vloggrid(0, 10, 1, 10cm, 20cm) ;

fmt_pictures := false ; % use TeX as formatting engine
textextoffset := ExHeight ; % a variable set by ConTeXt
draw hlintext.lft(0, 20, 5, 20cm, "@3e") ;
draw vlogtext.bot(0, 10, 9, 10cm, "@3e") ;

draw
function(1,"log(x)","x",1,10,1) xyscaled (10cm,2cm)
withpen pencircle scaled 5mm withcolor transparent(1,.5,yellow) ;
draw fullsquare xyscaled (10cm,2cm);
\stopMPcode

\startMPcode
draw fullsquare xyscaled (1cm,1cm);
\stopMPcode
\startMPcode
draw fullsquare xyscaled (2cm,1cm);
\stopMPcode
\startMPcode
draw fullsquare xyscaled (1cm,2cm);
\stopMPcode
\startMPcode
draw fullsquare xyscaled (1,2);
\stopMPcode
\stoptext