import java.awt.*;
import java.applet.*;

public class bubble extends Applet implements Runnable {
	int stuff[] = new int[1000];
	int a,b,c,q;
	boolean start=true;
	public void init(){
		setBackground(Color.white); 
		}

	public boolean mouseDown (Event e, int x, int y) {
		if(!start) start=true;
		return true; 
		}

	public void start(){
		Thread t = new Thread(this);
		t.start();
		}

	public void paint(Graphics g){
		for(a=0;a<100;a++){
			g.setColor(Color.green);
			if(a==c+1 && start) g.setColor(Color.blue);
			if(a>99-b) g.setColor(Color.red);
			g.fillRect(0,a,stuff[a],1);
			}
		}

	public void run() {
		while(true){
			if(start){
			for(a=0;a<100;a++) stuff[a]=((int)(Math.random()*100))+1;
				for(b=0;b<99;b++){
					for(c=0;c<99-b;c++){
						if(stuff[c]>stuff[c+1]){
							q=stuff[c];
							stuff[c]=stuff[c+1];
							stuff[c+1]=q;
							}
						repaint();
						try{Thread.sleep(10);}
						catch(InterruptedException e){}	
						}				
					}
				start=false;
				repaint();
				try{Thread.sleep(100);}
				catch(InterruptedException e){}	
				}
			}
		}
	}