A bright picture on a dark background with a glow of colorA bright picture on a dark background with a glow of color
The sign of the number pi is made up of black digits on the background of a row of gray digitsThe sign of the number Pi is made up of black digits on the background of a row of gray digits
Landscape of a mountain on the background of a lake and flowersLandscape of a mountain on the background of a lake and flowers