Execute is achieved by two performers: a “blind” performer concealed in a blue cube moves around from the inside and decides the route, while the other helps to adjust in order to keep away from visitors or other obstacles. Without causing any chaos, the “execution” within the space thus becomes rightful. “Execute” means “perform a duty, put a plan into action, implement”. Blue - as a pure colour - features bravery, serenity, reason and determination. This blue cube symbolises the intense spiritual concentration of humans’ survival in urban cities.