CF Endurance Workout (66%???)

Got this one from CF Endurance. Glad I didn't do all three rounds...

200s-400s-600s

2 rounds for time with a running clock:

200m run
Rest time it took to complete 200m (~:40 sec)
400m run
Rest time it took to complete 400m (~1:20)
600m run
Rest time it took to complete 600m (~2:00)

14:13

Three rounds of this would be no joke.

I can hardly wait...