how to make gui button zombie spawner?

so im trying to make a game like Clash of Clans also known as (CoC) that when you activate a gui button and click where ever you want a zombie will spawn

My idea

You should put the zombie into the ServerStorage, clone it and put it in the workspace

Steps

Step 1: Put the zombie in the ServerStorage

Step 2: Make sure that you have your Gui already, creat a local script in the button

Steps 3: Coding (put the code in the local script)

Script

local zombie = game.ReplicatedStorage.Zombie --the zombie
local button = script.Parent --the button

button.MouseButton1Click:Connect(function()
	zombie:Clone().Parent = workspace --no need to be game.Workspace
end)

Hope i helped you!