import random


def foo(l):
    for i in range(1, len(l)):
        temp = l[i]
        pos = i
        for j in range(i - 1, -1, -1):
            if temp < l[j]:
                l[j + 1] = l[j]
                pos = j
            else:
                pos = j + 1
                break

        l[pos] = temp
    return l


if __name__ == ‘__main__‘:
    l = list(range(13))
    random.shuffle(l)
    print(l)  # [12, 0, 4, 5, 6, 2, 11, 10, 8, 7, 3, 1, 9]
    print(foo(l))  # [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]