Rhythm can be described as a regularly repeated sound, movement or action. In most music the rhythm stays the same throughout the piece, but there are also music styles and compositions in which there are several simultaneous rhythms, or the rhythm changes throughout the piece or there is no rhythm at all. For us to be able to perceive rhythm we need to be able to perceive the continuity in the sequence, that is, we need to perceive the pauses as a transition towards the next sound, movement or action. How long can a pause be before we lose the thread? Sometimes in life it seems like things have come to a standstill and what was progressing has stopped. How long can the pause between events be before we perceive it as a stop and an end?