Iphone 4 taking blurry pictures when flash is on?

When i try to take a picture were i need the flash the picture is really blury and doesn't show up completely. This is a brand new phone

Sometimes when I take pictures a white square appears I'm supposed to wait for it to focus and turn green if I take the pucture before that it comes out blurry as fuuuuuk. Maybe that's the problem wait till the square turns green or tap the screen to make it get focus?