Editing Pinscreen animation (section)

==The pinscreen device==
[[File:Écran d'épingles - Détail.jpg|thumb|Close-up of a Baby Screen pinscreen from aside]]
A pinscreen is a white screen perforated with thousands of pins in small holes. Light shines from the side of the screen causing each pin to cast a shadow. Each pin, being able to slide back and forth through the holes, can cast different shadows. The pins do not move easily, presenting some resistance to movement in order to avoid unintended dislocation and thus image error. The pins' motion resistance depends on the pinscreen calibration. The white screen becomes darker the farther the pins are pushed out, protruding from the surface. The more the pins are pushed in less shadows are cast, the lighter the screen becomes, giving a grayish tone and eventually an all-white screen again.