were set by the sunrise and sunset. to create a cave-like effect they ditched their alarm clocks and wear blue blockers. >> it blocks out the blue light from indoor lighting or a tv screen and helps us get a more restful night sleep. >> they say their lives have never been better. rick lost 12 pounds and christine hasn't been sick since 2012. sara haines, abc news, new york. >> one thing that isn't part of the paleo diet? >> coffee. >> drink up. >> i need it. i'm not there yet an the coffee. yesterday we saw -- world coffee day. >> a latte. really good. >> we had our barista in here. she left some stuff over. we had a big mug. go to our website. wnnfans.com? >> you got it. good try. >> our facebook page. you can see our barista. >> i need some coffee. >> this is an extra, extra large grande, grande.