[SOLVED] Mouse Target value is nil?

So I don't really care if the value is nil, but whenever I click in a nil area I want it to print() but it won't print! It just gives me an error! Here's the code:

local Player = game.Players.LocalPlayer -- The Player
local DB = false -- Debounce
local Char = Player.Character -- Player's Character
local VariableTest = "Variable test" -- Test
local mouse = Player:GetMouse() -- The mouse
local Tool = script.Parent -- The tool
local Player = game.Players.LocalPlayer -- Player2
local Char = Player.Character -- Char2
local ReplicatedStorage = game:GetService("ReplicatedStorage") -- ReplicatedStorage -- FireEvent
local player = game.Players.LocalPlayer -- Player3
local mouse = player:GetMouse() -- Mouse2
local maxAmmo = 30 -- MaxAmmo
local ammo = maxAmmo -- MaxAmmo2
local rate = 60/850 -- FireRate. Don't touch the 60!!!!!!!!!!
local Canfire = true -- By default true
local reload = 1.5 -- Reload Time
local reloading = false
local UIS = game:GetService("UserInputService")
local damage = math.random(15,25) -- Damage
game.StarterGui.ScreenGui.Frame.TextLabel.Text = ammo


Tool.Equipped:Connect(function()
    script.Parent.Activated:Connect(function()
        game.StarterGui.ScreenGui.Frame.TextLabel.Text = ammo
        if ammo >= 1 and firing == false and Canfire == true and reloading == false then
            firing = true
            repeat
        local player = game.Players.LocalPlayer or game.Players.PlayerAdded:Wait() -- Camera-Shake stuff
local char = player.Character or player.CharacterAdded:Wait()
local hum = char:WaitForChild("Humanoid") 
local A = math.random(-0.1, 0.1)
    hum.CameraOffset = hum.CameraOffset + Vector3.new(0,A,0.1)
wait(0.01)
hum.CameraOffset = hum.CameraOffset - Vector3.new(0,A,0.1)
Tool.FlamePart.Transparency = 0 -- Flash effects
wait(0.000001) -- Wait Time for Flash FX
Tool.FlamePart.Transparency = 1
                script.Parent.M4A1:Play()
                print(ammo)
                wait(rate)
                ammo = ammo - 1
            until ammo < 1 or firing == false

(I have more code than this but all I need is the thing to print)