<div style="border: 0px solid ; overflow: auto; height: 350px; width: 145px; color: black; background-color: white;">YOUR BUTTON CODES HERE</div>
You simply want to add the html of the buttons where it says "YOUR HTML CODES HERE". You can change the appearance of your scroll box by changing the height, width, adding a border and adding a color (add color name after "solid").
If this happens to be a faulty code please send me a message. Also, if you are having any trouble with this please feel free to "Contact Me" at the top of this page!