Produce Flame Color:Black and the spell ends

and the spell ends

or someone uses an action to shake or slap the sleeper awake

but otherwise take no actions

You write on parchment

Produce Flame Color:Black and the spell endsA flickering flame appears in your hand. The flame remains there for the duration and harms neither you nor your equipment. The flame sheds bright light in a 10 foot radius and dim light for an additional 10 feet. The spell ends if you dismiss it as an action or if you cast it again. You can also attack with the flame, although doing so ends the spell. When you cast this spell, or as an action on a later turn, you can hurl the flame at a creature