2 rounds of the following:
1 on 1:35
2 on 1:30
3 on 1:25
4 on 1:20
1 on 1:30
2 on 1:25
3 on 1:20
4 on 1:15
1 on 1:25
2 on 1:20
3 on 1:15
4 on 1:10
1 on 1:20
2 on 1:15
3 on 1:10
4 on 1:05
1 on 1:15
2 on 1:10
3 on 1:05
4 on 1:00
1 on 1:35
2 on 1:30
3 on 1:25
4 on 1:20
1 on 1:30
2 on 1:25
3 on 1:20
4 on 1:15
1 on 1:25
2 on 1:20
3 on 1:15
4 on 1:10
1 on 1:20
2 on 1:15
3 on 1:10
4 on 1:05
1 on 1:15
2 on 1:10
3 on 1:05
4 on 1:00