Having created a new empty custom plugin in the previous post, we are now ready to change it to make it play sounds when the boolean value it monitors goes from false to true. The plugin is available in this GitHub repo. Adding some visual feedback Before we add the sound support, we’re going to add some visual feedback so we can test the widget and assure it’s working. We’ll crib from the Boolean Box built-in widget to display grey squares (but since the main goal is sound, not visual, we won’t add the color customization options).