Start positions:
Pairs at the corners of the endline.

Start :   (4x)
1->2 : sideways defending and roll out
2->3 : sprint to the net and corner attack
3->4 : turn around and dive inside to the 3m line
4->5 : to position 3 : attack
5->6 : under the net and double block
6->7 : sideways corner block
7->8 : defending following the sideline until endline is reached
8->1 : step out: and recover

Goal: speed + attention for the details of each movement.