Lock cursor movement to a single circle

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1

Godot Version

Godot 4.2.1

Question

To preface, I am a beginner to Godot and I am currently making a 2D game. The way I want the mouse movement to work is for the mouse to be stuck inside of a single circle that goes all the way around the character. My question is: How can I program the cursor to only stay on the border of this single circle?
I have asked on reddit but the only answer that I got was someone telling me that I need to use “Viewport.warp_mouse” as well as “InputEventMouseMotion.relative” without giving me any proper explanation of how or where I am supposed to use those specific things.
All I have so far is the basic movement that default to the CharacterBody2D. Is there any way somebody could help me figure this out?

3

This gives me the distance between the mouse and the position of the character and prints if it is greater than one hundred. Is there a specific function I could use to hold the mouse at a certain distance from the character constantly?