A rainbow can be seen from the clouds in the blue skyA rainbow can be seen from the clouds in the blue sky
An oscillogram, an image of a bright trace of musicAn oscillogram, an image of a bright trace of music
Three intertwining snakes in a blue mist on a black backgroundThree intertwining snakes in a blue mist on a black background
On a black background, a large blurred circle of blue colorOn a black background, a large blurred circle of blue color