Making a Working elevator /w door Minecraft 1.16

Today I am going to show you how to build an Easy elevator for pc in Minecraft! Please like and subscribe!

Blocks:
sea lantern x1
iron trapdoor x2
block of iron x9
slime block x8
sticky piston x9
Redstone dust x64
button x2
Redstone block x2
observer x4
obsidian x64
Redstone torch x2
any block of your choice x64

Part 1:
1:20
Part 2:
3:53
Part 3:
5:24
Part 4:
7:14