Double - Double 

This is a double-double.   Some people call it a delayed quad.   No matter what you call it, it is a great way to work memory into a setup.

EXECUTION SEQUENCE

CLASSIC: 

1. throw mark 1
2. throw mark 2
3. retrieve mark 2 
4. throw mark 3
5. throw mark 4
6. retrieve mark 4
7. retrieve mark 3
8. retrieve mark 1

SIMPLIFY: 

run the setup as two stand alone doubles

1. throw mark 1
2. throw mark 2
3. retrieve mark 2
4.  retrieve mark 1
5. throw mark 3
6. throw mark 4
7. retrieve mark 3
8. retrieve mark 4

ADVANCED: 

run the setup as a straight up quad and throw the marks in this order

1. mark 1
2. mark 3
3. mark 4
4. mark 2