Why is my iphone stuck on a loading screen?

Does anyone know what's wrong with my iPhone 5? I tried restoring it by going to settings & then Resetting all data & content, but it got stuck on a black loading screen, so I just held the power button in. After a few times of doing this, it wouldn't work so I tried to go on iCloud.com, then find my iphone, & then erasing my iphone from there. The same thing happened. Now, whenever I turn my iphone on, it just keeps going to the loading screen.

Added (1). No, it is not the screen that means connect to a computer. It's just a circle that goes around.

Is it the screen that means to connect it to itunes on a computer?