import random
def game(size):
    position = 1
    while position != size:
          throw = random.randint(1,6)
          if position + throw <= size:
              position += throw
          if position % 13 == 0:
              position -= 3
## check size before comparing if is int?
def param_check(param):
    if param < 10 or param is int:
        return

random.seed(100)     
game(13)
#param_check("a")