How to change your screen saver in OS X.

To change your screen saver in OS X, first access System Preferences by either going to the Apple in the top left corner or by clicking the icon in the Dock.

In the System Preferences pane, click on the Screen Effects icon.

Here you are able to select which screen saver you would like to use.

Click on the Activation tab if you would like to change the time delay before the screen effect starts. You may also want to have the screen saver password protected, if so, select "Use my user account password."

Finally, click on the Hot Corners tab. This enables you to automatically start your screen saver if your mouse enters a selected corner.