Workout at home. Fitness time!

Fitness time at home. Just do it!
Perform the following exercises with body weight.
Set 1:
- Pushups 15;
- Squats 15;
- Crunches 15.

Set 2:
- Pushups 14;
- Squats 14;
- Crunches 14.

Set 3:
- Pushups 13;
- Squats 13;
- Crunches 13.
...
...
...
Set 15:
- Pushups 1;
- Squats 1;
- Abs 1.
 

Rest 5 minutes.

Set 16:
- Pushups 1;
- Squats 1;
- Abs 1.

Set 17:
- Pushups 2;
- Squats 2;
- Crunches 2.

Set 18:
- Pushups 3;
- Squats 3;
- Crunches 3.
...
...
...
Set 30:
- Pushups 15;
- Squats 15;
- Crunches 15.