unless?

unless.py

#!/usr/bin/env python3

import sys

if __name__ == "__main__":
  if len(sys.argv) > 1:
    unless = sys.argv[1]
    for i in range(0, 10):
      print(" " * i * 2 + f"- {unless}")
    for i in range (9, -1, -1):
      print(" " * i * 2 + f"- {unless}")

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