Hi, how do I make it so that the blue ball will drop when the line hits it 5 times?

1. int tX=0; //tank
   int tof=40; //tank
   int barrel=40; //tank
   int endOflaser=0;
   int ballY = 0;
   int count = 0;
   boolean click = false;
   
   void setup() {
   size(640, 480);
   }
   
   void draw() {
   strokeWeight(5);
   background(255);
   
   fill(#1B6715);
   rect(tX,440, 80,40);
   
   fill(#1B6715);
   ellipse(tof, 460, 40,40);
   
   fill(255,0,0);
   line(barrel,440, barrel, 425);
   
   shoot();
   ball();
   }
   
   void keyPressed()
   {
     if(key=='d'){
       tX += 5;
       tof += 5;
       barrel +=5;
    
     }
      
     else if(key == 'a'){
       tX -= 5;
       tof -= 5;
       barrel -= 5;
   
     }
   }
   
   void mouseClicked(){
     click = true;
   }
   
   void shoot(){
     if(click){
     line(barrel, 415, barrel, endOflaser);
     }
    click = false;
    if(endOflaser == ballY)
      count++;
    }
   
   void ball(){
   fill(0,0,255);
   ellipse(300,ballY, 100,100);
   if(count == 5)
     ballY += 50;
   }