2 min on, 1 min off.
Each round lasts 2 minutes. Start each round with a buy-in exercise:
Run 100m out and back OR do jump rope: 100 singles/50 double unders
Then finish the 2 minutes with as many reps as possible of 1 exercise:
Round 1: Burpees
Round 2: Sprinter Situps
Round 3: Jumping Lunges
Repeat 2 more times.