Another way in which Bergman reminds the viewer that the film is a theatrical event is to display openly the mechanical stagecraft of the 18th century theater. The scenery of the time could hardly vie in realism with modern-day effects, but it was fluid and swiftly changeable. Thus when the Queen of the Night first arrives, day turns to night as we witness the shifting backcloths moving to create the new scene. Similarly, when Papagena and Papageno joyously discover each other in a winter landscape, the chiming of the magic bells quickly changes the scenery from Winter into Spring while the two characters remove each other's winter garments. The arrival of the Three Boys by descent in a charmingly decorated 18th-century hot-air balloon represents a faithful reflection by Bergman of Schikaneder's original libretto; Schikaneder's theater abounded in mechanical devices of this kind.