How to i make this script begin in MouseButton1Click?

script.Parent.MouseButton1Click:connect (function ()

playername = script.Parent.Parent.Parent.Parent.Parent.Parent.Name

player = Workspace:FindFirstChild(playername)

if player.player ~= nil then

local player.player = script.Parent

local humanoid = Player.Player:WaitForChild("Humanoid")

-- Create the Accessory.

local clockworksShades = Instance.new("Accessory")

clockworksShades.Name = "ClockworksShades"

local handle = Instance.new("Part")

handle.Name = "Handle"

handle.Size = Vector3.new(1,1.6,1)

handle.Parent = clockworksShades

local faceFrontAttachment = Instance.new("Attachment")

faceFrontAttachment.Name = "FaceFrontAttachment"

faceFrontAttachment.Position = Vector3.new(0,-0.24,-0.45)

faceFrontAttachment.Parent = handle

local mesh = Instance.new("SpecialMesh")

mesh.Name = "Mesh"

mesh.Scale = Vector3.new(1,1.3,1)

mesh.MeshId = "rbxassetid://1577360"

mesh.TextureId = "rbxassetid://1577349"

mesh.Parent = handle

-- Attach the Accessory to the humanoid.

humanoid:AddAccessory(clockworksShades)

end

end)