With this small construction you can extend the output signal of a button.
The structure shown allows the output signal to be extended when a button is pressed, e.g. a door can be left open longer by pressing a button.
Instructions:The repeaters must all point in the same direction to extend the output signal.
On the picture above is the simple version, this can be extended as you like.
In the picture you can see the direction of the repeaters. Each repeater is set to the last stage to extend the signal.