Complex sentence: In the first episode, "When Pigs Fly," he draws hundreds of flying pigs, and as he experiences his first drawing come to life, he tries to erase them all before his parents catch him.
Split into simpler sentences: In the first episode, "When Pigs Fly," he draws hundreds of flying pigs. As he experiences his first drawing coming to life, he tries to erase them all before his parents catch him.