1.Go to the plant & take the screwdriver.
2. go to the firs seen and click on the center of the wall , screw the 4 clues .
take the silver key.
3. go to the desk and open it using the silver key, now take the pink key.
4. go to the door and open it using the pink key.
5.keep going to see the other door, at the bottom right of it there is a gray "stick" ,take it.
6.go back to the first room , there is a block that has a different color, use the stick to remove it, take the golden key.
7.go to that door and unlock it .
Source The Red Room Walkthrough-EscapeGames24