Prompted I want to do a workout with 4 exercises and 4 sets of each exercise randomly mixed. Below you can see the 4 exercises and the repetition in each of the four sets. Please create a random order of the 16 sets I have to do: 
Exercises:
 1. Jumping Jacks 
2. Mountain Climbers 
3. High Knees 
4. Heels to the Heavens 

Sets:
 1. 10 Reps 
2. 12 Reps 
3. 15 Reps
 4. 20 Reps