Is there a way to shorten the length of this script, or make it more efficient?

I'm trying to make my own inventory, so far so good. But to me, this script that updates the inventory seems very long, and inefficient. Is there any way I can improve it?

local plr = game.Players.LocalPlayer
local buttons = script.Parent.IFrame:GetChildren()
local items = plr.Backpack:GetChildren()
local iframe = script.Parent.IFrame

function updateinven()
    for i = 1,#items do
        if #items == 1 then
            iframe.Button1.Visible = true
            iframe.Button1.ItemName.Value = items[1].Name
            iframe.Button1.Text = items[1].Name
        elseif #items == 2 then
            iframe.Button1.Visible = true
            iframe.Button1.ItemName.Value = items[1].Name
            iframe.Button1.Text = items[1].Name
            iframe.Button2.Visible = true
            iframe.Button2.ItemName.Value = items[2].Name
            iframe.Button2.Text = items[2].Name
        elseif #items == 3 then
            iframe.Button1.Visible = true
            iframe.Button1.ItemName.Value = items[1].Name
            iframe.Button1.Text = items[1].Name
            iframe.Button2.Visible = true
            iframe.Button2.ItemName.Value = items[2].Name
            iframe.Button2.Text = items[2].Name
            iframe.Button3.Visible = true
            iframe.Button3.ItemName.Value = items[3].Name
            iframe.Button3.Text = items[3].Name
        elseif #items == 4 then
            iframe.Button1.Visible = true
            iframe.Button1.ItemName.Value = items[1].Name
            iframe.Button1.Text = items[1].Name
            iframe.Button2.Visible = true
            iframe.Button2.ItemName.Value = items[2].Name
            iframe.Button2.Text = items[2].Name
            iframe.Button3.Visible = true
            iframe.Button3.ItemName.Value = items[3].Name
            iframe.Button3.Text = items[3].Name
            iframe.Button4.Visible = true
            iframe.Button4.ItemName.Value = items[4].Name
            iframe.Button4.Text = items[4].Name
        end
    end
end

plr.Backpack.ChildAdded:connect(updateinven)
plr.Character.ChildAdded:connect(updateinven)