I'm assuming you have to fill the square_list with the original numbers squared.
First, check the syntax in your for statement! It's missing a few important things:
for something in somewhere:
#do something that's indented
So when you wanna iterate through a list you do it like this:
for x in myList:
#do magic with your x element
OK then, let's iterate through start_list and do something with every element in each cycle:
start_list = [5, 3, 1, 2, 4]
square_list = [ ]
for x in start_list:
#maybe append the x element (squared) to the other list in each cycle?
And then at the end of the for you could rearrange and print the new list:
Update your code and let me know if it worked!