Trying to make a custom cursor but no luck, any help?

I have been trying to make a custom cursor for my game and used this in a local script which is located in starterplayerscripts

local mouse = game.Players.LocalPlayer:GetMouse()
mouse.Icon = "https://www.roblox.com/library/2712344393/25aa"

I've tried using Different Decals and using it on a baseplate but nothing seems to work.

any help?

Have you tried putting the script under StarterGUI? Also if you have, try making it a localscript.