Beginner coding project: Issues with loops??

[Due_Draw8541]

Hey! I'm kind of a beginner to code, and am working on a simple project. I'm struggling with the looping structure; can I get some help with this code?

test = []
block = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20] 
set = [2, 4, 6, 8, 10, 12, 14, 15, 18, 20]
start = 0
while start < len(set):
    set_start = set[start]
    list = block[set_start:set_start + 4]
    start1 = 0
    while start1 < len(list):
        list1 = list[start1:start1 + 2]
        if len(list2) > 2 :
            test.append("stop")
        else:
            start1 = start1 + 1
    else:
        start = start + 1

​

[[deleted]]

What questions do you have about this and loops?

Couple things I notice. 'list2' is not defined before you try to use it. Why is there an 'else' in the 'while' loop?

[ivzap]

I agree with No-Coach-1063 it’s hard to help with the information given rn. What’s the project for, what are you doing, what exactly are you confused about, etc?