For a realtime display of the Listen to colors composition, there is a need for a screen with speakers, an internet connection, webcam(s) from the participant(s) and a "performing time window". The Timewindow makes shure that during opening and presentation of the work, something is happening in front of the webcam. The happening is arranged by the artist and is based on the local -color and movement- information and will be composed according to the length of the timewindow.