for i = 0 to 1
  for j = 0 to 1
    print i
    print j
    if (i) then
      if (j) then
        print "i is true j is true"
      else
        print "i is true j is false"
      end if
    else
      if (j) then
        print "i is false j is true"
      else
        print "i is false j is false"
      end if
    end if
  next j
next i