Stairway

A stairway to heaven...(I doubt it).   I spotted this pattern on the wall at my local community center.  I go there most days to walk the indoor track as I still cannot lift anything greater than twenty pounds, and it's cold outside.
The retirees at the center thought I was silly to take a photograph of a wall from a stairwell.  
https://www.youtube.com/watch?v=2cZ_EFAmj08

They have no sense of humor.
How many letters are in the Christmas alphabet? 25 — there’s noel.