temporary variable doesn't store the original value

Question

I have this list of lists:

lst = [[1],[2],[3],[4]]  

And I want to move the i+1 element to the [0] index, like this:

[[2],[1],[3],[4]] / [[3],[1],[2],[4]] / [[4],[1],[2],[3]]    

This is my code:

lst = [[1],[2],[3],[4]]

a = []  
count =0
for i in range(1,5)  :
     
    temporary = lst
    
    lst.insert(0,lst[i])
    del lst[i+1]
    a.append(lst)
    print(lst,temporary)
    break
    

I see that the temporary variable doesn't store the initial values of lst. I assign the values of lst variable to temp variable before I make changes on the lst, hence I expect the temp variable to hold the initial values of lst, and not the changed values of lst. Where is my mistake?

Thanks