From 0:00-4:00
2 rounds of:
8 Power Snatch 35kg/25kg
8 Chest-to-bar pull-ups
From 4:00-8:00
2 rounds of:
10 Power Snatch 35kg/25kg
10 Chest-to-bar pull-ups
From 8:00-12:00
2 rounds of:
12 Power Snatch 35kg/25kg
12 Chest-to-bar pull-ups
Etc., following same pattern until you fail to complete both rounds