Every 5 minutes for 6 rounds:
Sprint 200 meters, for time
Run 400 meters
Rest the remainder of each five minute period. Post 200 meter sprint times to comments.
How this will look:
Start timer, sprint 200 meters, note time (lap button) and slow down and run 400 more meters. Rest until the running clock hits 5 minutes. Reset timer and repeat 6 times total.