Geometric patterns in architecture

This week's challenge theme is Geometric Patterns.  I had to go into Victoria yesterday, and as I was driving out of the top level of the parkade, I spotted these patterns on the roof of a building.  I pulled in to another spot and took a quick photo.  I didn't have time to walk down to see what the building was, but I'll look next time I'm in the city.  
Obviously the seagulls like to perch on the rooftop.