20*25

1,2,3,4,5 Last 1 Fast,  Every 4th 25 Choice of stroke

6,7,8,9,10 Last 2 Fast

11,12,13,14,15 Last 3 Fast

16,17,18,19,20 Last 4 Fast

into

2 rounds

50 easy 50 TT

then

25s Beep Test