Graham Gremore spent much of his teens on the stage of SteppingStone Theatre. Even then, he wrote his own plays. Now a college student in Los Angeles, Gremore returned home a couple weeks ago for the premiere of Streetcar! — the second show he authored for SteppingStone — a musical penned with a Los Angeles friend and composer, Sasha Smith. At a dress rehearsal, 3-Minute Egg talks with Gremore about his methods and future as a playwright. Performances continue through March 29.