The Japanese have finally revealed a mystery for you.

How does the small arrow on your computer monitor screen work when we
move the mouse?

Haven't you ever wondered how it works?

Now, through the miracle of high technology, we can see how it is done.
With the aid of a screen magnifying lens, the mechanism becomes
apparent. Click on the link below and you will find out. When it
appears, slowly move your mouse over the light grey circle in any
direction and you will see how the magic works. Also try clicking.