"Submit your creative ideas for rain paint stencils that celebrate rain and some of Vancouver’s best qualities—public space, sustainability and resiliency, and our relationship to water.
Enter the rain paint idea contest and share your ideas for rain paint stencils that will brighten up our city and add a bit more fun to our public spaces every time it rains."
https://vancouver.ca/home-property-development/rain-paint-contest.aspx
Deadline for submissions is August 17, 2018.
(Apparently the city is utilizing a biodegradable product from a Seattle company. We should get some and build a robot.)