A dark and quiet place is essential for having a good sleep. Most of us have might experienced of having a nap on a moving bus. Though the noise from engine and wheels couldn't stop us falling asleep, we felt much more tired than before. Because our brain needs to give responds to any sound and light from the messy environments. In that case, our brain keeps working all the time. So, the best place for sleeping is our bedroom. Turning off the light and closing our eyes may be the most relaxed thing we want to do after a hardworking day. Nothing can stop us falling asleep within 5 minutes. The sound of breathing while sleeping is a wonderful tune with a bright sun and a lovely owl outside. Sometimes, even snoring menas that your are just having a great sleep. Of course, you should sleep alone if you have the habit of snoring.