How do I make a part follow my mouse (PC and Mobile)?

once the player summons the part, call this function that places the part on the mouse position:

local player= game:GetService("Players").LocalPlayer
local mouse = player:GetMouse()
local character = player.Character or player.CharacterAdded:Wait()
local onRenderedStep 

--function that makes the part follow the mouse
function makePartFollowMouse(part)
	if(not mouse.TargetFilter)then
		mouse.TargetFilter = part
	end 

	part.CFrame = 
			CFrame.new(mouse.Hit.p) --place brick at mouse's position 
			* CFrame.new(0, part.Size.Y/2, 0)--shift up brick so the brick on top of the mouse's position instead of smack dab in the middle
end

part = Instance.new("Part", workspace)
onRenderedStep = game:GetService("RunService").RenderStepped:Connect(function() makePartFollowMouse(part) end)

--if you want to stop makign the brick follow the mouse do the following:
--onRenderedStep:Disconnect()