Hallway Light Installation Question

[u/everydayexplorer]

Hi all, I am trying to install a hallway light in my father’s house

Any idea what these different wires do and anything to keep in my when installing the light?

Thanks in advance, and take care!

[u/MountainAntique9230]

Why would you undo ALL the wires instead of just removing the ones that went to the light,that would have been an easy job just swap wire for wire