Is their a way to make your screen lock? IPhone 4?

You know how you are lying down sometimes and your watching a video or texting and the screen changes it's direction as the same way your laying down. Is their a way where you can lock your screen to stay the same direction when you are lying down. So it can't change the direction? Using iPhone 4

Double click your home button and go to the left and there's a button that is like a rotated circle click that

It's called lock orientation.

1. Double click the home button to bring up the multitasking bar.
2. Swipe right until the last set of icons is displayed in the multitasking bar (these will include play/pause and skip buttons for iPod or Pandora).
3. The furthest left icon looks like a circular arrow - touch this icon to enable or disable rotation lock on the iPhone.
4. A rotation lock icon will appear in the status bar next to the battery charge icon when rotation lock is enabled. This looks like a circular arrow around a padlock.

Yes

double tap Home button
scroll to left, by music controls, there will be a button with an arrow. Tap that.

Locks the screen rotation in portrait.