How to open a safe?

[kimsu5125]

I used a coding book to convert it, but I only have notes with alphabets and numbers on it, and I don't know how to use it anymore

[480 Games]

1. Did you combine the 4 codes using the build app? This will create a notebook with all 4 but in hexadecimal (letters & numbers).
2. When you use the Blue coding book on the notebook of hex codes it should convert all of them to decimal (no letters).
3. Go to the secret room and click on the safe, use the notebook with the codes on the dial to unlock the safe.

[kimsu5125]

It didn't work because I was going to do it only with the build. Thank you very much.