Visual countdown timer, for up to 60 minutes. Click anywhere on the dial to set the desired time; the timer will automatically count down from there. You'll hear a short audio signal when time is up. Click button in top left corner (or press P on keyboard) to pause/resume the timer.
Based on the "Time Timer" product line, popular in (autism) classrooms. https://www.timetimer.nl/ Code by @heldlaw; please feel free to remix. Button image and "coin" sound from Scratch's library.