Well done acorn, this was the answer I was going to give :) Still plenty of numptys on this site with these type of questions, they seem to be let loose towards the weekend.
Septic Peg, November 2012
If you search here for other such stupid non questions, you will find the answer.
It has been asked so many times before we get very annoyed when it keeps popping up.
"daylight flashing intermitently" perhaps it is the clouds moving quickly across the sun.
