function paintBackground() {
    temp--;
     g2d.fillStyle = "#FFFFFF"
     var flag = true;
     for(var y = 1; y < 925; y++) {
         if(y%16 == 0);
         else continue;
         flag = !flag;
         var startx = 1000;
         if(flag == true) startx = 1000;
         else startx= 955;

         for(var x = startx; x > 0; x-=70) {
                if(x+40+temp <= 0) {//THIS COULD BE THE PROBLEM HERE
                    temp = 0;
                    break;
                }
              g2d.fillRect(x+temp, y, 40, 2);