Complex sentence: After that, each night Seymour nurses his creation with blood from his fingers, and although he feels increasingly listless, Audrey Jr. begins to grow, and the shop's revenues increase due to the curious customers who are lured in to see the plant.
Split into simpler sentences: After that, each night Seymour nurses his creation with blood from his fingers. Although he feels increasingly listless, Audrey Jr. begins to grow and the shop's revenues increase due to the curious customers who are lured in to see the plant.