fingerpainting on the go

As she picked her way down to the coast to head towards Auster for the winter, a little glitter caught her eye. The first time she noticed the luminous bacteria, she'd thought it was a fluke and ignored it. But the next day she saw it again. And again. Glimmering in puddles, on the seashore. Her interest was piqued. She had one last major stop before heading for the bifrost - the Fern Gulley, where she'd spent most of the summer, and had hid most of her painting supplies. There was no telling if the shimmering color present in the water would still be there when she reached the gulley. Siobhan pulled to a short stop in front of a wide, shallow puddle that shone with light. She admired it, her eyes shining with inspiration in return. Maybe a short break wouldn't delay her too long... what would this look like on a canvas?