This much I know: Anthony Clarvoe wrote a play about successive generations of a single family who spend the 20th century migrating westward, from their native Croatia to the United States and then on to Japan. What I don't know, having only this amateurish Thunder & Lightning Ensemble production to go by, is how Clarvoe's play might come across given half a chance. I think maybe it would be a smart, if predictable, serio-goofball look at what constitute roots in a compulsively mobile world. But that's only a guess based on available hints. D.B. Schroeder's direction makes it impossible to draw any real conclusions. The play's multiple eras get mushed together, its staging suggests talking heads. This Clarvoe comes across confused and boring. Through 6/24: Thu-Sat 7:30 PM, City Lit Theater Company, Edgewater Presbyterian Church, 1020 W. Bryn Mawr, 773-332-9939, $15.