Can You Escape 3: Level 2 Walkthrough

Look around the room and find the books that show the following clues:

Square w/ circle outside of it: I
Triangle w/ circle outside of it: II
Triangle w/ circle inside of it: III
Square: IV
Inside the cabinet with clues “IV” and “II” take the screw.
Tap the desk on the left wall and tap the top right drawer. Enter the combination:

Top left (Square): IV
Top Right: III
Bottom Left: II
Bottom Right: I
Take the feather ink pen and notice the wood piece with the empty slots underneath.
Tap the desk in the back of the room (the place where the grey book was) and put the feathered pen into the holder. It’ll open the drawer. Take the ink. Combine the ink with the screw in your inventory.
Go back to the desk on the left and tap the big drawer in the middle. Use the ink on the paper next to the green book and it’ll reveal three lines each with a black tick mark at a specific location. Remember the locations.
Go to the typewriter at the right desk. Change the black balls to reflect where the tick marks were on the paper:

Top: 2 taps
Middle: 1 tap
Bottom: 4 taps (far end)
Take the wooden pieces.
Go back to the drawer where you got the feather ink pen (step 2) and place the wooden pieces into the draw. Tap to turn them so they reflect the pattern of the wooden block. Tap each letter individually to make it face the right direction then tap where it needs to go into the block.
Take the key and use it to escape.