3 Candle lights what is mean ?? Finding the Residence key 001 - Resident Evil 1 - Part 12

Used crank into square shaped hole
3 candle lights - Orange = orange billiard ball no. 5
- Green = green billiard ball no. 6
- Red = red billiard ball no. 3
What is this mean? wait for the next video Part 13
Finding the residence key 001