# This program draws square box figures.
# This second version uses a parameter.

# Prints a box of the given height filled with dots.
def draw_box(height):
    print("*" * (height * 2))
    for line in range(height - 2):
        print("*", "." * (height * 2 - 2), "*", sep="")
    print("*" * (height * 2))

def main():
    print("This program draws three boxes.")
    draw_box(5)
    print()
    draw_box(7)
    print()
    draw_box(3)

main()