How would i make improve this script so that it will run when a model is added to workspace?

as well as keep the if distance > 75 then thing running so as soon as the distance is greater than 75 it will delete them?

local player = script.Parent.Parent.Parent
table.foreach(workspace:GetChildren(),
    function(i,v)
        if v.ClassName == 'Model' and v ~= player and v.Torso ~= nil then
            local distance = (player.Character.Torso.Position-v.Torso.Position).magnitude
            if distance <= 75 then
                local billgui = Instance.new('BillboardGui',script.Parent)
                local infogui = Instance.new('TextLabel',billgui)
                billgui.Active, AlwaysOnTop, Enabled = true, true, true
                infogui.Active = true
                billgui.Size = UDim2.new(0,100,0,100)
                infogui.BackgroundTransparency, BorderSizePixel = 1, 1
                infogui.Position = UDim2.new(0,-50,0,0)
                infogui.Size = UDim2.new(0,200,0,50)
                infogui.FontSize = 'Size24'
                infogui.Text = (v.Name)..' Lvl: '..(v.Level.Value)
                billgui.Adornee = v.Head
                if distance > 75 then
                    billgui:remove()
                    infogui:remove()
                end
            end
        end
end)