“I made a wish on this tree years ago," Marco says.
"What did you wish for?" Bailey asks.
Marco leans forward and whispers in Bailey's ear. "I wished for her."”
~ the Night Circus
So, this is Marco lighting the candle on the wishing tree, and wishing for Celia.
It's unexpectedly difficult to colour flames that are supposed to be white. Also I utterly messed up the scarf. But oh well.