Complex sentence: Impressed, Antonucci began developing the characters and spent months designing the show, and faxed a one-page concept sheet to Cartoon Network and Nickelodeon in 1996.
Split into simpler sentences: Impressed, Antonucci began developing the characters and spent months designing the show. After months of designing the show, Antonucci faxed a one-page concept sheet to Cartoon Network and Nickelodeon in 1996.