Start with the first exercise and continue till you finish every single exercise without any rest periods in between. When you finished the first round, start again with the first exercise. This is a circuit training which includes multiple exercises which you have to perform for a specific number of sets.
30 X CROSS OVER MOUNTAIN CLIMBER
30 X SINGLE LEG GLUTE BRIDGE
30 X SUPERMAN
30 X ELBOW TAP PUSH UP
Repeat 4X