How to achieve the effect of automatic page up and down of the mouse

Take a novel page, you open the page first, then press the middle wheel button on the page, now everyone's mouse has the middle wheel button. The mouse without the mouse wheel button is out of print on the market. After pressing the wheel button, an icon button will appear. As shown below:

The circle icon button appears and you don't need to click the mouse, just drag the mouse to move up and down, press the left or right mouse button or Any key on the keyboard will stop scrolling. Of course, when you click the move icon button, you only need to move down a little bit, so you can move the page down without moving the mouse. The farther your mouse icon is from the icon at the circle, the faster the scrolling speed, and vice versa.
In fact, it is so simple, and if you share it with everyone, if you are not moving the mouse, the page will scroll, so that is caused by pressing the mouse wheel button. This is also a detail problem that many novice users ignore. Then you will now try to automatically turn the mouse down and up.