If you are trying to build a 1x1 piston trap door within the actual Minecraft game:
: Glue parts matching the same numbers together, keeping the printed markup on the inside for a clean finish. Game Information (Version 0.2.999+) lovely craft piston trap 3.0
Lovely Craft is a community-focused Minecraft server. We build beautiful things. We also build beautiful traps. Play fair, don’t grief, and always smile when the floor says goodbye. If you are trying to build a 1x1
This creates a single, clean pulse. When an entity stands on the floor, the observer sees a block update (the entity counts as a solid object in Lovely Craft), triggers the pulse, extends the pistons for 0.3 seconds, then retracts. triggers the pulse