The point was that when someone walks on it, the contact is made between the two pieces in paper, and when the person walks out of it, the two part got back to their initial place without contact. In theory, it should work, but in practice, the material we had was too unreliable to allow it. Two errors were made with this first prototype. First, The cardboard got damaged too easily and the contact would get stuck after a few uses, even a more solid cardboard wouldn’t have done the job. Second, the shape of the aluminium, a rectangle didn’t allow the electric current to run fluently which made the mechanism to bug.