tracking succesive numbers

#finding longest succesive run of a number in a list
"""This part of the program prints 0s and 1s in a particular order"""
L = []
for i in range(0,11):
    L = L + [0] + [1]*i
L.append(0)
print(L)
print()
"""This section randomly prints 0s and 1s and finds the longest succesive run of 0 in the list"""
L = []
from random import randint
for i in range(100):
    L = L + [randint(0,1)]
largest = 0
num = 0
for item in L:
    if item == 0:
        largest += 1
        if largest > num:
            num = largest
    elif item == 1:
        largest = 0
print(L)
print('The longest run of zeros is '+str(num)+'.')