classroomscreen.com is a terrific way to set up various widgets on one screen for use throughout a class period.
Traffic light, timer, clock, work symbols, random name generator and the ability draw on a picture, such as a diagram of your gym floor or outdoor space are all quick and easy to access.
You cannot save your setup, but it is quick and easy to do.
You can even set up 2 windows side by side if you have 2 groups!
Here's a quick video tutorial: https://www.youtube.com/watch?v=2O70WXwHZKg
Give it a go!!