When i can sleep?!

One sleep cycle comprises of four stages and lasts for about 90-120 minutes.
Waking up in the middle of a sleep cycle leaves you feeling tired and groggy,
but waking up in between cycles lets you wake up feeling refreshed and alert!








Try this website which counting backwards in sleep cycle !
http://sleepyti.me/

i wish for all nice dreams zZz . . . . .