This puzzle can be quite complicated if you do not know what you are doing. However, we will guide you through a step by step process to unlock the secret of 4-5.
First of all, pick up everything that you see in the room:
1. Pick up the match on the table.
2. Pick up the wrench near the table.
3. Pick up a bottle of water.
4. Pick up the teddy bear.
Speed pass note
To instantly pass the stage, simply type in the code using the abacus and unlock the door.