Various stripes of different shades of blue and blackVarious stripes of different shades of blue and black
Clouds of different shades of blue on a dark backgroundClouds of different shades of blue on a dark background
Lots of gray slabs and walls of different sizes, and a red umbrella next to one of themLots of gray slabs and walls of different sizes, and a red umbrella next to one of them
Arbitrary abstractions of different colors on a gray heterogeneous backgroundArbitrary abstractions of different colors on a gray heterogeneous background