How to make a double piston extender.

Place 2 sticky pistons facing whichever direction you want. Then place 2 repeaters right next to the sticky pistons. Set one of them to 4 ticks and the other one on 2 ticks. Place redstone right next to the repeaters. Finally place two pieces of redstone next to the other redstone and the repeater.   BYE!!! GUYS!!!!!