Mesecons Tutorial - 2x2 Sticky Piston Door

[Mesecons](https://forum.minetest.net/viewtopic.php?p=4785#p4785) [Digilines](https://forum.minetest.net/viewtopic.php?p=78524#p78524) [Pipeworks](https://forum.minetest.net/viewtopic.php?p=27794#p27794) [Digiline Stuff Modpack](https://forum.minetest.net/viewtopic.php?p=187963#p187963) [MoreMesecons](https://forum.minetest.net/viewtopic.php?p=189284#p189284) [Code](https://gitlab.com/snippets/1815412)