Four colored ball - four different sound. Balls revolve in a circle and illuminating extinguished, thereby creating a melody that you will repeat when they light up even brighter. The difficulty lies in the fact that the balls continue to move and you have to literally catch them. And with each level the number of notes and the rate increases, which makes the melody more beautiful, but it complicates the task of you. Enjoy create melodies and develop aural memory.