Automatically trigger mouse scroll using JS

This is a small and simple project to automatically trigger mouse scroll events. Say for example if we press key 'a' it will scroll with certain speed, if 'b' is pressed it will scroll with more speed and if 'c' is pressed, then it will stop scrolling.

You can assign certain keys to scoll and it has to be scrolled vertically.

I guess it should be completed within 1 hour