What is the logic for safe code in bedroom .. 2451 I can not understand your clue ?

I believe this is the code from Room 5, Afterlight. The paper has lines drawn on it in red in 4 groups. You need to select numbers on the digital display where the lines of the numbers do not include the lines in red on the paper.

If you take a digital 8 (which has all the lines included) and remove the red lines on the paper in each position you will end up with the numbers 2, 4, 5, 1

Hope this explains it more clearly. If not let us know.