Diane got the tips of her hair burnt as she practiced with her most dedicated concentration. Thus, she didn't notice at all the heat or the fire.

"Apparecium!" she said again, waving her hand over the parchment. It didn't sound difficult at all, now did it. Actually, the difficult part may be drawing or writing in the dark. So when she finally managed to uncover her writing, it rather looked like an obsene drawing.

She blinked at that. Then the page was set on fire. Little did other people know, this pyrotechnics were on purpose.