This document discusses Plunker, an online code editor tool. It contains several sections about how Plunker was created through mistakes, compositions, and friendships. The founder of Plunker discusses how he initially deployed the tool by saving code directly to his computer's file system out of necessity, and how making mistakes led to Plunker's existence. Later sections explain that Plunker combines existing tools like MEAN stack, Ace editor, and duct tape, and that open source code and communities help programmers be productive. The document encourages readers to make mistakes, compositions, and friends.