\environment pagecolumns-000

\definepagecolumns
  [example]
  [n=2]

\setupbackgrounds
  [text]
  [background=color,
   backgroundcolor=color-1]

\starttext

\startpagecolumns[example]

  \dorecurse{20}{\fakewords{100}{200}\par}

\stoppagecolumns

\stoptext
