:)

Some Useful Websites For Your Reference.
http://www.circuit-finder.com/categories/led-and-light/light-flasher/808/dark-activated-led-or-lamp-flasher
http://wild-bohemian.com/electronics/flasher.html
http://electroschematics.com/6011/flashing-leds-with-photoresistor/
http://www.instructables.com/id/LED-flashing-circuit/