William Andrew Finlay Stewart’s Hopscotch creates an environment of tension and anticipation through a complex structure of data translation, where the movement of a round of hopscotch is mediated by the maximum length of time members of a horn section can sustain a note within one breath. The video of the hopscotch is slowed down through computer editing to coincide with the sustained play of the instruments in real time. The composition of the music has been determined through a rendering of the numbers designating the ward system of Toronto. The piece itself becomes a poetic manifestation of a mundane political system, placed against the backdrop of Toronto’s alleys.