How to make it so when the I click whit a tool the script runs?

I am new on scripting and I can't seem to figure out how to make it so when the I press on the screen the script runs. I'm trying to make a transformation as a tool. I found a YT video by Blur but instead of the transformation being a tool it's just the script and when you press P you transform. How do I make it so when I press the screen I transform and when I press it again I go back to normal?

Here's the Local Script that is in the starterpack:

local player =  game.Players.LocalPlayer
local uis =  game:GetService("UserInputService")
local remote = game.ReplicatedStorage:WaitForChild("Transformation")
local ts =  game:GetService("TweenService")

repeat wait(1)until player.Character.Parent == workspace

local char =  player.Character
local debounce = false
local active =  false
local cd =  1
local cam =  game.Workspace.CurrentCamera
local hum = char:WaitForChild("Humanoid")

uis.InputBegan:Connect(function(input,IsTpying)
    if input.keyCode ==  Enum.KeyCode.P and IsTpying == false then
        if debounce == false then
            debounce =  true
            if active ==  false then
                cam.CameraType = Enum.CameraType.Scriptable
                cam.CFrame = player.Character.HumanoidRootPart.CFrame *  CFrame.new(Vector3.new(0,0,-5))*CFrame.Angles(0,math.rad(180),0)
                ts:Create(cam,TweenInfo.new(1,Enum.EasingStyle.Quad,Enum.EasingDirection.Out,0,false,0),{CFrame = player.Character.HumanoidRootPart.CFrame *  CFrame.new(Vector3.new(0,-1,-4))*CFrame.Angles(0,math.rad(180),0)}):Play()

                remote:FireServer(active)
                active =  true
            elseif active ==  true then
                cam.CameraType = Enum.CameraType.Scriptable
                cam.CFrame = player.Character.HumanoidRootPart.CFrame *  CFrame.new(Vector3.new(0,0,-3))*CFrame.Angles(0,math.rad(180),0)
                ts:Create(cam,TweenInfo.new(1,Enum.EasingStyle.Quad,Enum.EasingDirection.Out,0,false,0),{CFrame = player.Character.HumanoidRootPart.CFrame *  CFrame.new(Vector3.new(0,0,-4))*CFrame.Angles(0,math.rad(180),0)}):Play()
                remote:FireServer(active)
                active =  false
            end
        end
    end
end)

remote.OnClientEvent:Connect(function()
    cam.CameraType = Enum.CameraType.Custom
    wait(cd)
    debounce =  false
end)

My version of the script inside the tool:

local player =  game.Players.LocalPlayer
local uis =  game:GetService("UserInputService")
local remote = game.ReplicatedStorage:WaitForChild("Transformation")
local ts =  game:GetService("TweenService")
local mouse = game.Players.LocalPlayer:GetMouse()

local char =  player.Character
local debounce = false
local active =  false
local cd =  1
local cam =  game.Workspace.CurrentCamera
local hum = char:WaitForChild("Humanoid")

local tool = game.StarterPack.Bloodlust
tool.RequiresHandle = false
tool.Parent = game.Players.LocalPlayer.Backpack

function onActivation()
    print("Tool activated")
end

tool.Activated:Connect(onActivation)



repeat wait(1)until player.Character.Parent == workspace

        if debounce == false then
            debounce =  true
            if active ==  false then
                cam.CameraType = Enum.CameraType.Scriptable
                cam.CFrame = player.Character.HumanoidRootPart.CFrame *  CFrame.new(Vector3.new(0,0,-5))*CFrame.Angles(0,math.rad(180),0)
                ts:Create(cam,TweenInfo.new(1,Enum.EasingStyle.Quad,Enum.EasingDirection.Out,0,false,0),{CFrame = player.Character.HumanoidRootPart.CFrame *  CFrame.new(Vector3.new(0,-1,-4))*CFrame.Angles(0,math.rad(180),0)}):Play()

                remote:FireServer(active)
                active =  true
            elseif active ==  true then
                cam.CameraType = Enum.CameraType.Scriptable
                cam.CFrame = player.Character.HumanoidRootPart.CFrame *  CFrame.new(Vector3.new(0,0,-3))*CFrame.Angles(0,math.rad(180),0)
                ts:Create(cam,TweenInfo.new(1,Enum.EasingStyle.Quad,Enum.EasingDirection.Out,0,false,0),{CFrame = player.Character.HumanoidRootPart.CFrame *  CFrame.new(Vector3.new(0,0,-4))*CFrame.Angles(0,math.rad(180),0)}):Play()
                remote:FireServer(active)
                active =  false
            end
        end
    end
end)

remote.OnClientEvent:Connect(function()
    cam.CameraType = Enum.CameraType.Custom
    wait(cd)
    debounce =  false
end)

The Script in serverscriptservice:

local remote = game.ReplicatedStorage:WaitForChild("Transformation")

remote.OnServerEvent:Connect(function(plr,active)
    local char =  plr.Character

    if active == false then
        for i,v in pairs(char:GetChildren())do
            if v:IsA("Part")then
                game:GetService("TweenService"):Create(v,TweenInfo.new(.7,Enum.EasingStyle.Quad,Enum.EasingDirection.Out,0,false,0),{Color = Color3.fromRGB(132, 8, 8)}):Play()
                v.Material = Enum.Material.Neon
            end


        end

        local Sound1 =  script:WaitForChild("DBZ_Beam_Charge"):Clone()
        Sound1.Parent =  char.HumanoidRootPart
        Sound1:Play()
        game.Debris:AddItem(Sound1,2)

        local pushmodel =  script:WaitForChild("Push"):Clone()
        pushmodel.Parent =  workspace
        pushmodel.Core.CFrame =  char.HumanoidRootPart.CFrame * CFrame.new(Vector3.new(0,-1,0))
        for i,v in pairs(pushmodel:GetChildren())do
            v.Anchored =  true
            local tween = game:GetService("TweenService"):Create(v,TweenInfo.new(1,Enum.EasingStyle.Quad,Enum.EasingDirection.Out,0,false,0),{Size = v.Size + Vector3.new(10,10,10),CFrame =  v.CFrame * CFrame.Angles(0,math.rad(180),0)})
            tween:Play()
            tween.Completed:Connect(function()
                local tween2 = game:GetService("TweenService"):Create(v,TweenInfo.new(.5,Enum.EasingStyle.Quad,Enum.EasingDirection.Out,0,false,0),{Transparency = 1})
                tween2:Play()
                tween2.Completed:Connect(function()
                    game.Debris:AddItem(v,0)
                end)
            end)
        end
        spawn(function()
            wait(1)
            local flash =  script:WaitForChild("Flash"):Clone()
            flash.Parent =  plr.PlayerGui
            game.Debris:AddItem(flash,.5)

            local sound2 =  script:WaitForChild("Explosion"):Clone()
            sound2.Parent =  char.HumanoidRootPart
            sound2:Play()
            game.Debris:AddItem(sound2,1.5)
            for i,v in pairs(char:GetChildren())do
                if v:IsA("Part")then
                    v.Material = Enum.Material.Plastic
                end
            end
        end)

        local BeamEffect =  script:WaitForChild("BeamEffect"):Clone()
        BeamEffect.Parent =  char
        BeamEffect.CFrame =  char.HumanoidRootPart.CFrame


        local weld =  Instance.new("Weld")
        weld.Part0 = char.HumanoidRootPart
        weld.Part1 =  BeamEffect
        weld.Name = "TransformationWeld"
        weld.Parent = weld.Part0

        char.Humanoid.Animator:LoadAnimation(script:WaitForChild("transformAnimation")):Play()
        local bodyVelocity =  Instance.new("BodyVelocity",char.HumanoidRootPart)
        bodyVelocity.MaxForce = Vector3.new(math.huge,math.huge,math.huge)
        bodyVelocity.Velocity  = char.HumanoidRootPart.CFrame.LookVector*.0001
        game.Debris:AddItem(bodyVelocity,.8)
    elseif active == true then
        if char:FindFirstChild("BeamEffect")then
            char:FindFirstChild("BeamEffect"):Destroy()
        end
        if char.HumanoidRootPart:FindFirstChild("TransformationWeld")then
            char.HumanoidRootPart:FindFirstChild("TransformationWeld"):Destroy()
        end
        char["Left Arm"].Color = char["Body Colors"].LeftArmColor3
        char["Right Arm"].Color =  char["Body Colors"].RightArmColor3
        char["Torso"].Color = char["Body Colors"].TorsoColor3
        char["Right Leg"].Color =  char["Body Colors"].RightLegColor3
        char["Left Leg"].Color = char["Body Colors"].LeftLegColor3
        char["Head"].Color =  char['Body Colors'].HeadColor3

        local bodyVelocity =  Instance.new("BodyVelocity",char.HumanoidRootPart)
        bodyVelocity.MaxForce = Vector3.new(math.huge,math.huge,math.huge)
        bodyVelocity.Velocity  = char.HumanoidRootPart.CFrame.LookVector*.0001
        game.Debris:AddItem(bodyVelocity,.8)

    end
    wait(1)
    remote:FireClient(plr)
end)