How to work with jQuery draggable using selenium webdriver?

import org.openqa.selenium.By;
import org.openqa.selenium.Point;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.interactions.Actions;


public class testdragjquery {

    private static WebDriver myTestDriver;
    public static void main(String[] args) throws InterruptedException {
        myTestDriver = new FirefoxDriver();
        myTestDriver.get("http://tinyurl.com/2rxmut");


        Point MyPoint= myTestDriver.findElement(By.id("insideParent")).getLocation();
        System.out.println(MyPoint.x+"--------"+MyPoint.y);


            WebElement draggable = myTestDriver.findElement(By.id("insideParent"));
            new Actions(myTestDriver)
            .dragAndDropBy(draggable, MyPoint.x + 10, MyPoint.y +20)
            .build()
            .perform();
            Thread.sleep(5000L);
            new Actions(myTestDriver)
            .dragAndDropBy(draggable, MyPoint.x + 20, MyPoint.y +20)
            .build()
            .perform();

            Thread.sleep(5000L);
            new Actions(myTestDriver)
            .dragAndDropBy(draggable, MyPoint.x + 30, MyPoint.y +20)
            .build()
            .perform();
            Thread.sleep(5000L);
            new Actions(myTestDriver)
            .dragAndDropBy(draggable, MyPoint.x + 40, MyPoint.y +20)
            .build()
            .perform();
            Thread.sleep(5000L);
            new Actions(myTestDriver)
            .dragAndDropBy(draggable, MyPoint.x + 50, MyPoint.y +20)
            .build()
            .perform();

            myTestDriver.quit();
    }

}