"Papilio!"
Emily said quietly. Several blue butterflies erupted from her wand tip.
Concentrating, she produced many more, and with great difficulty made them form her name in the air. But blue was for Ravenclaw, so she repeated the spell, and this time was rewarded with several flocks of green, red and yellow butterflies.
Emily laughed to herself and waved her wand so the insects formed the letter 'H' with one quarter of each colour. Laughing again, Emily wondered what to do next.