Pretty much the title. I'd like to have certain effects occur while the player is charging up the spell, which would mostly be for show. Once its fully charged and they cast it the "ritual" is completed. Is it also possible to detect if they stopped charging? Or a way to prevent them from stopping charging? Or would it just be simpler to have them cast a spell on themselves and then the effects occur?

Apologize if not being clear, still tryin to get the hang of this.