Begginer Redstone problems (minecraft bedrock)

So, I want a system where if a button is pressed, it produces an output of 1. Press it again, and go up to 2. If it is below 5, I will measure it and light up a lamp that has a sign on it that says "a". Above 5 it will change from the "a" lamp and turn on a lamp that has a sign labelling it "b". How can I go about doing this? Im a begginer but I have big plans.