Localzzz

player = game.Players.LocalPlayer
mouse = player:GetMouse()
i = Instance.new("Part")
i.Anchored = true
i.Color = Color3.new(0,0,0)
i.Size = Vector3.new(1,1,1)
while wait() do
    i.Position = Vector3.new(mouse.Hit.p.X, 0, mouse.Hit.p.Z)
end
while wait() do
    mouse.Button1Down:connect(function()
        local z = Instance.new("Part")
        z.Anchored = true
        z.Color = Color3.new(0,0,0)
        z.Size = Vector3.new(1,1,1)
        z.Position = Vector3.new(mouse.Hit.p.X, 0, mouse.Hit.p.Z)
    end)
end