reflection to function

"""
    This program creates a haiku function
"""
def my_haiku():
    haiku=[]
    howmanylines=int(input("How many lines do you want your poem to have? "))
    for item in range(howmanylines):
        lines=input("Here is the line indexed to number "+str(item)+": ")
        item+=1
        haiku.append(lines)
    for line in haiku:
        print(line)
my_haiku()

"""
    This program calculates and prints out an area of triangle after
    asking inputs from the user, assumming the height and base are in cm
"""
def area_triangle():
    height=int(input("What is the height of your triangle? "))
    base=int(input("What is the base of your triangle? "))
    area = 0.5*height*base
    print("The area of triangle is: ",area,"centimeter squared")
area_triangle()

"""
    function that simulates a coin flip.
"""
import random
def toss_coin():
    coin_face=["head","tail"]
    random.shuffle(coin_face)
    for item in coin_face:
        random.shuffle(coin_face)
        print(item)

toss_coin()