//to add1 x y z = x + y + z

to fac n = 
  n = 2
  fac n - 1

to main | a b =
  ax = array 10
  bx = array 20
  if a == 1  b = 2 else b = 4

  for a 1 10
    b = 2
  case a
    10: b = 1
    15: b = 2
    else: b = 4
  a = 10