Last year I found a game online I really liked, the background was black and there were these circles that controlled a flow of light, and you had to direct the light to touch every circle to get a song, like classical music. There were different phases, t he first was Winter, and in each phase there were circles that changed the colour of the light, for example in winter there were blue circles and in summer there were pink and orange. Does anyone know the name of it?

Rythymracer?

Ah no, I found it eventually; it's Auditorium :) Thanks anyway x