A piece of blood-stained paper, caught up from some meat-buyer's dust-heap, beat up and down the road without the gate; too flimsy to rest, too heavy to fly away; and a few straws kept it company.

The next day, the young artist came to the gate of the subway station, Different than the day before, he took out a large piece of paper and laid it on the ground and put some stones on it.

Digital logic gate circuits are manufactured as integrated circuits: all the constituent transistors and resistors built on a single piece of semiconductor material.