How would I fix this to make a visual inventory system? [closed]

Here is the source code to my Local script in my Tool named "Test"

local Players = game:GetService("Players")
local Player = Players.LocalPlayer
local mouse = Player:GetMouse()
local replicate = game.workspace.yello
local toolz = script.Parent




script.Parent.Equipped:connect(function(mouse)
    mouse.Button1Down:connect(function()
        if mouse.Target then
            print("The Mouse is pointing to the" .. mouse.Target.Name)
            if mouse.Target.Name == "Hello" then
                replicate:Clone()
                replicate.Position = game.Hello.Position
                toolz:Destroy()
            end
        else
            print("The Mouse is pointing at nothing")

        end
    end)
end)

I sort of want this type of inventory system.

https://gyazo.com/83799e2b72adedd05bb2948903dbcca2