Butterflies

Somebody has arranged the whole butterfly house by colour, and the effect is a rainbow laid flat. Deep blues and violets crowd the left-hand edge, then it runs through turquoise into every green there is, out to lemon and gold across the middle, and finishes in a blaze of orange, then scarlet, then hot pink.

Each one is a different species with its wings held open, and the background shifts along with them so the whole sheet glows.