content: sub main()
      counter = 0
      10:
      print "counter:"; counter
      counter++
      if counter < 2
          print "goto 10"
          goto 10
      else if counter = 2
          print "goto 20"
          goto 20
      end if
      return
      if counter >= 5
          20:
          for x = 1 to 2
              if x = 2
                  goto 30
              end if
              for i = 1 to 2
                  print "nested:"; x; " -"; i
              end for
              30:
              if x = 2
                  print "back to 10"
                  goto 10
              end if
          end for
      end if
  end sub
  