As the disease progresses you have to lock the loved one up at night in order to get your sleep. Make sure the bedroom, and ideally a bathroom too, is safe. This becomes a night time haven for your loved one. Before taking on the responsibility of caring for an Alzheimer's victim, you must have the resources to provide a locked environment. Remember that no requests, arguments, threats will keep them safe except for a locked door.
Patterns become familiar to our loved ones.
I followed the same patterns for the whole three years. I think Dad became accustomed to the patterns, even though he wanted to change them continually. Every day brought on a new theme for my Dad. The themes kept him busy and I tried to encourage them. It was hard when the behavior was destructive, or emotionally draining to me.