How to make the instance track the mouse like a clock

I did a experiment!
QQ图片20200519153323|547x500

I want to make a controllable clock,so I want to use the mouse to control the hour hand like the picture
I sent .
I made a cone,the thick end is fixed in the center of the interface,and the thin end points to the mouse.
But I can’t be very precised.(As a beginner, I can’t upload my files)

Welcome to the forum!
If I have understood correctly what you are trying to achieve, I’d suggest to look up the Object CHOP in the operator snippets.
go to Help, Operator Snippets, and you will see some examples.
the Object CHOP can calculate values like the distance & rotation between a target object and a reference object.

I truly appreciate your help.,I’ll try. :smile: