Workout

Warm-up (600)
400 swim
...every 3rd 50 kick

Set (600)
12 x 50's on 1:00
...odd- 12 kicks/3 strokes
...even- 25 fast/25ez

Set (2000)
100ez
150 fast on 2:00  
100ez
2 x 150s fast on 2:00
100ez 
3 x 150s fast on 2:00
100ez
4 x 150s fast on 2:00
100ez

Set (600)
2 rounds
6 x 50s on 1:00
3 drill/dps, 3 fastest average

Cool down (200)
200 EZ