I was a bit of redstone to joking. Suddenly I built something cool that the same effect as a T flip-flop.

System 1: This is a system that allows a quick piston withdraw without takes the block
The block come above a redstone torch. The redstone torch activate the
other systems.

System 2: This system is activated by system 1.
It opens the door for a few seconds then close again.
Go a lamp.

Thank for Reading and viewing.

Bye,

Appmine