Why Am Is My scrip Not Printing The Passed time?

I'm learning from Youtube Vid And I copied all of the script why isn't it Printing the Passed Time

local Player = game:GetService("Players").LocalPlayer


local rp = game:GetService("ReplicatedStorage")
local Combat = rp:WaitForChild("RemoteCombat")

local UIS = game:GetService("UserInputService")

local Debounce = false
local cd = .25

local CurrTime = 0
local PrevTime = 0


UIS.InputBegan:Connect(function(input,isTyping)
	if isTyping then
		return
	elseif input.UserInputType == Enum.UserInputType.MouseButton1 then
		if Debounce == false then
			--Debounce = true
			CurrTime = tick()    
			
			local PassedTime = CurrTime - PrevTime
			
			print(PassedTime)
			
		end
	end
end)

Your question was very vague and I didn't understand it very well, but if you want a count to start when the player presses on the screen then I modified your script to that. For counting "For do" is the best option.

Here in this script it counts from 0 to 30

This is a LocalScript in StarterGui

local Player = game:GetService("Players").LocalPlayer


local rp = game:GetService("ReplicatedStorage")

local UIS = game:GetService("UserInputService")

local debounce = false -- Here so that the player does not restart the count if it has already started 

local incrementTime = 1 -- how far the countdown progresses 

local startTime = 0 -- the number at which counting will begin 

local finalTime = 30 -- the final count number 

UIS.InputBegan:Connect(function(input)
	if input.UserInputType == Enum.UserInputType.MouseButton1 then
		if debounce == false then
			
			debounce = true
			for count = startTime, finalTime, incrementTime do

				print(count)

				wait(1) --Speed at which the counting is done here in this case 1 second 
				
				if count == 30 then
					debounce = false
				end
				
			end
		end
	end
end)

I hope I have helped you