You can't.
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With pistons. watch a you tube tutorial on piston doors
In Minecraft, you cannot turn invisible without using mods or cheats. If you are playing in survival mode, there is no built-in way to turn invisible. It's important to play the game in a fair and respectful manner.
just tap the door
Place wooden planks in all of the boxes in a crafting table apart from the top three.
I didn't make Minecraft.