2 rounds of:
Run 500 meters
Jog 500 meters
Run 400 meters
Jog 400 meters
Run 300 meters
Jog 300 meters
Run 200 meters
Jog 200 meters
Run 100 meters
Jog 100 meters
Rest 5 minutes between rounds.
Target pace for run intervals is your 1 mile max effort.
Warm-up and cool-down efficiently.