"Einstein on the Beach" was followed by further music for projects by the theatre group Mabou Mines such as "Dressed like an Egg" (1975), and again music for plays and adaptations from prose by Samuel Beckett, such as "The Lost Ones" (1975), "Cascando" (1975), "Mercier and Camier" (1979). Glass also turned to other media; two multi-movement instrumental works for the Philip Glass Ensemble originated as music for film and TV: "North Star" (1977 score for the documentary "" by François de Menil and Barbara Rose) and four short cues for the children's TV series "Sesame Street" named "Geometry of Circles" (1979).