Impromptu perceives space as various rhythmic organisms carrying objects formed by colourful flows. The composition of space and objects is meant to blur the existence of rational measurement tools, making numeric weight an ambiguous sense, and the seemingly regular movement is in fact a collection of multiple rhythms. The tone and expression in the space is adjusted with action tagging, the tagged objects or objects as tags then wander to their own melodies in different time dimensions, gradually composing a flowing and rhythmic narrative that depicts the difference (décalage) between time and space.