I looked out the window at the flocks of birds flying together. It was amazing. They all spun in a circle and flew to the next end of the open circle. It was the endless rhythm of their mass flight that I had been drowning in for a while. Endless rhythm! This excerpt reminded me of Robert Deloni's masterpiece, Rhythm. Yes, circles with wavy motion with repetitive rhythm was my choice to create this effect, because the circle is a symbol of movement. This effect is designed by layered images by changing the color and form, which gives you the pleasure of watching the flight.