Sorting system

The mess on the table eventually got to me so I went to the basement for my sorting rack. We rented for 11 years before buying a house and the rental houses had very little closet space. I bought 2 of these pants racks back in the 1960's. I gave the other one to someone years ago but kept this one, just in case I would need it.I sort the strips from dark at one end to light at the other.
I'm still making blocks in between cleaning the basement for my art quilters on Monday and cleaning off all flat surfaces in the house. If every surface had a slight tilt to it would we not be pilers? Or would we just use the floor to pile on?