var imgX = 40;
            var imgY = 40;
            var imgSize = 140;
            var score =0;
            var gameState = "L1";
            
            function preload() {
              img = loadImage('https://juyeongkang.github.io/virus.png');
              img2 = loadImage('https://juyeongkang.github.io/Mutate.png');
            }
            
            function setup() {
              createCanvas(600, 600);
              textAlign(CENTER);
              textSize(20);
            } // end setup
            
            
            function draw() {
              background(150,75,0);
              if(gameState == "L1"){
                levelOne();
              }
              if(gameState == "L2"){
                 levelTwo();
              }
              
              text(("Kill Point: " + score), width/2, 40);
              
            
            } // end draw
            
            
            function levelOne(){
              text("COVID-19", width/2, height-20);
              var distToImg= dist(imgX, imgY, mouseX, mouseY);
              if (distToImg 10){
                 gameState = "L2";
              }
              
              
              image(img, imgX, imgY, 50, 50);
            } // end level one
            
            
            function levelTwo(){
               background(80,80,80);
              text("Mutant COVID-19", width/2, height-20);
              var distToImg2= dist(imgX, imgY, mouseX, mouseY);
              if (distToImg2 20){
            
              fill(random(255));
              }
              
              
              image(img2, imgX, imgY, 100, 100);
            } // end level Two