How to make the Div scroll?

Question

How do i get the middle div to scroll past the header while the others stay in place?
I want the middle div to move upwards instead of the whole page moving down.

https://code.sololearn.com/WACzXt5fQyVK/#

Answer 1

div{
overflow: scroll;
}

Answer 2

I'm trying to make the entire div move not the content inside