I'm currently working on a clicker game, and I wanted to add a scroll bar so I could have more items in my shop. You can also use the mouse wheel, or use the two finger scroll on a laptop. The items all repeat, but they are each a different clone. If you want to use this, you can, but PLEASE give credit. I have commented on the code to help you. =^..^=
The scroll bar code is by me, but I did not discover the mouse wheel code.