def every(arr, every_num):
    new_list = []
    for i in range(0, len(arr), every_num):
        new_list.append(arr[i: i + every_num])

    return new_list


mylist = [1, 2, 3, 4, 5, 6, 7, 8, 9]
result = every(mylist, 4)
print(result)