"Spin4 example"
"author : afmika"

(+03<5>)yx/+x      "stack is 1 -1 -1 0 -1"
[<][<]             "stack is -1 0 -1 1 -1"
[x]                "-1 in acc x"
[y]                " 1 in acc y"
+                  "-1 + 1 := 0, push 0 in the stack"
[.n]               "print 0"