Issue with background painting over asseroid objects, think it is a problem with for loop synchronization

Space Fighters

import java.awt.*;
import java.applet.*;
import java.awt.event.*;
import java.util.ArrayList;

public class Space_Fighters extends Applet implements Runnable, KeyListener{

	Graphics bufferGraphics;
	Image offscreen;
	Dimension dim;
	static boolean ingame = false;
	static boolean menu = true;
	static int select = 0;
	static Image player1ship;
	static Image player2ship;
	Image jShip;
	Image cShip;
	Image pShip;
	Image redAsseroid;
	Image pinkAsseroid;
	Image purpleAsseroid;
	Image purpleExplosion;
	Image darkBlueAsseroid;
	Image darkBlueExplosion;
	Image pinkExplosion;
	
	
	static int player1x = 230;
	static int player2x = 742;
	static int player1acc = 0;
	static int player2acc = 0;
	static int accTimer1 = 0;
	static int accTimer2 = 0;
	static boolean accCount = false;
	static boolean accCount2 = false;
	static ArrayList<Asseroid> rockList;
	static int rockTimer = 0;






	public void run(){
		



	while(ingame || menu){

	if(ingame){

	player1x = shipUpdateOne();
	player2x = shipUpdateTwo();


	spawnRock();

	

	rockTimer++;
	}




	repaint();
	MyLibrary.sleep(17);



	if(accCount)
		accTimer1 += 1;
	if(accCount2)
		accTimer2 += 1;

		}
	}

	public void init() {

		dim = getSize();
		offscreen = createImage(dim.width,dim.height);
		bufferGraphics = offscreen.getGraphics();
		addKeyListener(this);
		
		Thread main = new Thread(this);
		main.start();

		jShip = getImage(getDocumentBase(), "Justin_Ship.PNG");
		cShip = getImage(getDocumentBase(), "Chris_Ship.PNG");
		pShip = getImage(getDocumentBase(), "Pat_Ship.PNG");
		pinkAsseroid = getImage(getDocumentBase(), "pinkAsseroid.PNG");
		pinkExplosion= getImage(getDocumentBase(), "pinkExplosion.PNG");
		purpleAsseroid = getImage(getDocumentBase(), "purpleAsseroid.PNG");
		purpleExplosion= getImage(getDocumentBase(), "purpleExplosion.PNG");
		darkBlueAsseroid = getImage(getDocumentBase(), "darkBlueAsseroid.PNG");
		darkBlueExplosion= getImage(getDocumentBase(), "darkBlueExplosion.PNG");
		redAsseroid = getImage(getDocumentBase(), "redAsseroid.PNG");
		

	}

	public void update(Graphics g){

		paint(g);
	}


	public synchronized void paint(Graphics g) {

	Image main1 = getImage(getDocumentBase(), "Menu1.JPG");
	Image main2 = getImage(getDocumentBase(), "Menu2.JPG");
	Image main3 = getImage(getDocumentBase(), "Menu3.JPG");


	if(menu){

	switch (select){
		case 0:

		bufferGraphics.drawImage(main1,0,0,this);
		break;

		case 1:
		bufferGraphics.drawImage(main2,0,0,this);
		break;

		case 2:
		bufferGraphics.drawImage(main3,0,0,this);
		break;

		}
	
	}



	if(ingame){

	bufferGraphics.setColor(Color.black);
	bufferGraphics.fillRect(0,0,1024,768);

	bufferGraphics.setColor(Color.white);
	bufferGraphics.fillRect(507,0,10,768);

	bufferGraphics.drawImage(player1ship,player1x,600,this);
	bufferGraphics.drawImage(player2ship,player2x,600,this);




 // /*
	for(int count = 0; count<rockList.size(); count++){
	
		switch (rockList.get(count).type){
			
			case 3:
				bufferGraphics.drawImage(redAsseroid, rockList.get(count).xPos,rockList.get(count).yPos,this);
				System.out.println(rockList.size());
			break;
				
			case 2:
				bufferGraphics.drawImage(purpleAsseroid, rockList.get(count).xPos,rockList.get(count).yPos,this);
				System.out.println(rockList.size());
			
			break;
				
			case 1:
				bufferGraphics.drawImage(pinkAsseroid, rockList.get(count).xPos,rockList.get(count).yPos,this);
				System.out.println(rockList.size());
				
			break;
				
			case 0:
				bufferGraphics.drawImage(pinkExplosion, rockList.get(count).xPos,rockList.get(count).yPos,this);
				System.out.println(rockList.size());
			break;
			
		}
		//try{Thread.sleep(500);}catch(Exception e){}
		
	}
// */

	}


	g.drawImage(offscreen,0,0,this);

	}


	public void stop(){

	}






	public void keyPressed(KeyEvent e){

		switch (e.getKeyCode()){

			case KeyEvent.VK_UP:
				if(menu){
					if(select == 0)
						select = 2;
					else
						select--;
				}
				break;

			case KeyEvent.VK_DOWN:
				if(menu){
					if(select == 2)
						select = 0;
					else
						select++;
				}
				break;
			case KeyEvent.VK_LEFT:
				player2MoveLeft();
				break;
			case KeyEvent.VK_RIGHT:
				player2MoveRight();
				break;
			case KeyEvent.VK_W:
				break;
			case KeyEvent.VK_A:
				player1MoveRight();
				break;
			case KeyEvent.VK_D:
				player1MoveLeft();
				break;
			case KeyEvent.VK_ENTER:
				if(menu){
				menu = false;
				ingame = true;
				rockList = new ArrayList<Asseroid>();
					switch(select){

					case 0:
					player1ship = pShip;
					player2ship = cShip;
					break;

					case 1:
					player1ship = jShip;
					player2ship = pShip;
					break;

					case 2:
					player1ship = cShip;
					player2ship = jShip;
					break;
						}
					}

					break;
		}
	}

	public void keyReleased(KeyEvent e){

		switch(e.getKeyCode()){

			case KeyEvent.VK_UP:
				break;
			case KeyEvent.VK_LEFT:
				player2StopMovement();
				break;
			case KeyEvent.VK_RIGHT:
				player2StopMovement();
				break;
			case KeyEvent.VK_W:
				break;
			case KeyEvent.VK_A:
				player1StopMovement();
				break;
			case KeyEvent.VK_D:
				player1StopMovement();
				break;
		}
	}

	public void keyTyped(KeyEvent e){

	}



	public static int shipUpdateOne(){

		player1x += player1acc;
		if(player1x > 427)
			player1x = 427;
		if(player1x < 0)
			player1x = 0;
		return player1x;

	}

	public static int shipUpdateTwo(){

		player2x += player2acc;
		if(player2x < 517)
			player2x = 517;
		if(player2x > 944)
			player2x = 944;
		return player2x;

	}

	public static void spawnRock(){

		int chance = MyLibrary.getRandNum(200,900);
		if(rockTimer > chance){
			rockList.add(new Asseroid());
			rockTimer = 0;
			
		}

	}
	
	public static void player1MoveRight(){
		
		accCount = true;
		
		if(player1acc>0)
			player1acc = player1acc * -1;
					
		player1acc = -3+((-1)*(accTimer1/20));
		
		
	}
	
	public static void player1MoveLeft(){
		accCount = true;
				
		if(player1acc<0)
			player1acc = player1acc * -1;
					
		player1acc = 3 + (accTimer1/20);
	}
	
	public static void player2MoveRight(){
		accCount2 = true;
				
		if(player2acc<0)
			player2acc = player1acc * -1;
				
		player2acc = 3 + (accTimer2/20);
	}
	
	public static void player2MoveLeft(){
		accCount2 = true;
				
		if(player2acc>0)
			player2acc = player1acc * -1;
				
		player2acc = -3 + ((-1)*(accTimer2/20));
	}

	public static void player1StopMovement(){
		player1acc = 0;
		accTimer1 = 0;
		accCount = false;	
	}

	public static void player2StopMovement(){
		player2acc = 0;
		accTimer2 = 0;
		accCount2 = false;
	}

}