why is my iphone 5s flashing and not letting me do anything not even turn it off

[iMore Question]

its just flashing then the screen goes black you push button its still flashing been like this nearly an hour

 

[Just_Me_D]

How is it flashing? Is the screen flashing on and off? Is the camera's flash flashing? Please join the iMore forums and explain yourself a bit better in this thread. Thank you.