Using the While loop

Question

6.) Scenario – You are playing a guessing game with your little cousin. She wants you to guess her favorite color. Create a program using the While loop. Below is a code I'm writing but having trouble with the while loop.

package loopscenario;
import java.util.Scanner;
import java.util.Random;
/**
 *
 * @author macbook
 */
public class LoopScenario6 {
public static void main(String[] args)
{
 String blue = null;
 String yellow = null ;
 String red = null;
 String pink = "pink";
 String favoriteColor = null;

 Scanner keyboard = new Scanner(System.in);
 Random randomNumber = new Random();
 Random aRan = new Random();


 while (!favoriteColor.equalsIgnoreCase(pink))

     if (favoriteColor.equalsIgnoreCase(blue))
     {
         System.out.println("Wrong color. Please try again.");
     }
     else if( favoriteColor.equalsIgnoreCase(yellow))
     {
       System.out.println("Wrong color. Please try again.");  
     }
     else if ( favoriteColor.equalsIgnoreCase(red))
     {
      System.out.println("Wrong color. Please try again.");     
     }
    else 
     {
      System.out.println("Yes!");     
     }
    }
}