The requirements were that it had to be interesting, not "overbuilt" or too technology-heavy, and easy to follow. The machine also had to be built on a shoestring budget, synchronize with beats and lyrics in the music and end on time over a 3.5 minute song, play a part of the song, and be filmed in one shot. To make things more challenging still, the space chosen was divided into two floors and the machine would use both.