You can use your mouse to scroll the bar or you can just move it normally. [BIG UPDATE]
I made this in like 20 minutes. Don't expect much. V1.0 (Radiation Effect) V1.1 (Added Thumbnail) V1.2 (Fixed The ball from going off the bar) V1.3 (Made it easier to scroll the ball) V2.0 (BIG UPDATE!!! THE EFFECT UPDATE)