Below is simple snippet of code.
@FindBy(className = \"element-to-press\")
private WebElement elementToPress;
// some other code
Keys move = Keys.ARROW_DOW
Update 2
Refer the above answer for fullcode
Update 1
SafariDriver Extension doesn't work with Selenium 2.46.I've tried it and you have to downgrade the Selenium to 2.45 as SafariDriver Extension for 2.46 is not released yet.Refer this GitHub Issue
So as of now go with Selenium 2.45
You have to install SafariDriver Extension Manually
As per SafariWiki
Starting with Selenium 2.45.0, you must manually install the SafariDriver browser extension. Simply open the latest copy of SafariDriver.safariextz in Safari and click the "install" button. Once installed, writing a test for Safari is just as straightforward as using the FirefoxDriver