You are either talking about chromatic scales or the twelve tone technique which requires all 12 tones to be used before you can repeat them again. One notable composer would be Aaron Copland take a look when you can.
Answer: C418 just told us a story about a caver and a creeper, and we had to put together the pieces. TL;DR : disc 11 happens during disc 13, the man in disc 11 was running from a creeper