stars.py

def main():
    for i in range(1, 6):
        print("*" * i)

    print("\n\n")

    for i in range(1, 6):
        print((" " * (5 - i)) + ("*" * i))

    print("\n\n")

    for i in range(1, 6):
        print("*" * (i * 2 - 1))

    print("\n\n")

    for i in range(1, 6):
        print(" " * (5 - i) + "*" * (i * 2 - 1))


if __name__ == "__main__":
    main()