What do you do if you have created a song on the piano and you can't read music? Can you still compose it?

When you say create do you mean pressing random keys? Because if so, then as along as you remember the keys and you can still play it, then yes you can compose it.

renascimento comercial, que, a partir do século 11, inaugurou definitivamente a baixa idade média, que se estenderia até o século 15.