content: set is_open to {}
  repeat 100 times
     set end of is_open to false
  end
  repeat with pass from 1 to 100
    repeat with door from pass to 100 by pass
      set item door of is_open to not item door of is_open
    end
  end
  set open_doors to {}
  repeat with door from 1 to 100
     if item door of is_open then
       set end of open_doors to door
     end
  end
  set text item delimiters to ", "
  display dialog "Open doors: " & open_doors
  