In this guide, you will come to know how to make a trap door in Bloxburg.
You will first need to make 1*5 blocks of the basement and place a wall in it and a secret bookshelf door just next to it.
After that, add four placemats on the first shelf, as shown in the image below.
You have to cover the empty area and secret door with cubes and place four crates on the placemats.
Now will need to apply the grass except the crates and apply any color to the crates to complete the trap door.