How to make a Button that can change text everytime?

I want to make a Butten that can change text infinte to what i wanted:

local state = script.Parent.State

if script.Parent.Up.MouseButton1Click:connect() then
	state.Text = "3"
	idk
	state.Text = "4"	
	elseif script.Parent.Up.MouseButton1Click:connect() then
	state.Text = "3"
	idk
	state.Text = "4" 
	
end

But i don't know what to put in idk or how it works? Can anyone help me?