Do you know about commands with Minecraft?

Hey I'm currently building a big construction project in Minecraft and now I want to build a door with commands so it opens like a sliding door if you know Rad I mean if you can help me word would be very great LG Joschi

Very easily. You must / fill [coordinates] [coordinates] Minecraft: [id of the block].

And you do that every time until it comes to a point where the door closes.