//ninja1 - Mouse Click Event
//for the teaching, we want to ask ninjas what we want to happen
//next we need to know when we want it to happen
//and how will we make this happen -- try to ilicit if() 
//should only happen IF ninja is visible
if($this.visible()){
    //if the ninja is visible, we'll do the following:
    $this.toggleVisible();
    $this.scene.score+=1;
    lblScore.text($this.scene.score);
    
}

//Scene - initialize when scene starts
$this.score = 0;
//following code is pre-populated:
if($this.scene.state() == "PLAY"){
    var ninjaTime1 = random(3000, 1000)
  createTimer(ninjaTime1,  function(){
        ninja_1.toggleVisible();
    });  
    var ninjaTime2 = random(3000, 1000)
  createTimer(ninjaTime2,  function(){
        ninja_2.toggleVisible();
    });
    var ninjaTime3 = random(3000, 1000)
  createTimer(ninjaTime3,  function(){
        ninja_3.toggleVisible();
    });
    var ninjaTime4 = random(3000, 1000)
  createTimer(ninjaTime4,  function(){
        ninja_4.toggleVisible();
    });
}