Complex sentence: Desperate in search of more money so they can get "two for one", Butt-head finds and elderly woman who gives him one dollar, while Beavis guards the machine, stopping Mr. Anderson from putting his money in.
Split into simpler sentences: Desperate in search of more money so they can get "two for one", Butt-head finds an elderly woman who gives him one dollar. Meanwhile, Beavis guards the machine, stopping Mr. Anderson from putting his money in.