import random

heads = 0
tails = 0

#this is a loop, so everything in here gets re-called everytime
# you used to only call randint() once
while heads + tails != 100:
    coin = random.randint(1,2)
    print(coin)
    if coin == 1:
        heads += 1

    elif coin == 2:
        tails += 1

print("You flipped",heads,"heads and",tails,"tails.")