Today you’re going to need a timer/interval timer/watch (there are a ton of free apps for phones that do this too!)
The workout of the day is every minute, on the minute.
Grab a pair of lightish dumbbells for some overhead pressing.
Every minute, for 15 minutes, you are going to perform:
10 overhead presses
10 squats holding the dumbbells
Your rest is the time you have left in each round.