Although I have an alarm clock , it's generally other things that wake me, and during the week I really don't want to get up for work, I want to stay in bed.
I tend to hear cars on the road outside that start around five am , and I think these people must get up really early to be driving at this time. The next thing is at around five twenty the heating comes on and you can hear water coursing through the radiators , then twenty five minutes later the actual alarm goes off and thein it is time to drag myself out of bed.
There will be lots of things that wake you up , the dawn chorus is a good one. When I lived in Shieldfield there was a lit yard behind the flat and the dawn chorus went on all night, although I slept through it.
My second job was as a computer operator for Peter Ctaig and I worked "continental shifts" which was days followed by nights and in a week you would work Monday day , then Tuesday night then Thursday day and Saturday morning , then the next week was Monday night etc. That taught me to be able to sleep any time anywhere.
So that's a few things on sleeping and stuff and I thought I would go with something by The Strawberry Alarm Clock , with then thought The Alarm was even more direct so we'll have "68 Guns". On tThe Best of The Alarm there is a song called "The Stand(Long Version)" that clocks in at 2'47" , not sure how long the sort version is.