\environment columnsets-000

\definecolumnset[example][n=4,page=left]

\definecolumnsetarea
  [one][left]
  [x=1,y=1,nx=2,ny=6,
   background=contrast,state=repeat]

\definecolumnsetarea
  [two][right]
  [x=3,y=1,nx=2,ny=6,
   background=contrast,state=repeat]

\definecolumnsetarea
  [three][both]
  [x=2,y=10,nx=2,ny=6,
   background=contrast,state=repeat]

\starttext

\startcolumnset[example]

  \dorecurse{30}{\fakewords{50}{100}}

\stopcolumnset

\stoptext