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                img#cat(src="", alt="")


                $color_yellow: #E6AF2E

html, body 
  margin: 0
  width: 100%
  height: 100%
  overflow: hidden
  background-color: $color_yellow

  width: 300px
  position: absolute
  left: 50%
  transform: translateX(-50%)
  bottom: 0
  position: absolute
  &:before, &:after
    content: ""
    display: block
    width: 60px
    height: 15px
    background-color: #fff
    position: absolute
    left: 50%
    top: 50%
    transform: translate(-50%, -50%) rotate(45deg)
    transform: translate(-50%, -50%) rotate(-45deg)


  var x = evt.pageX;
  var y = evt.pageY;
  console.log(x + "," + y);
  $("#cross").css("left", x+"px");
  $("#cross").css("top", y+"px");
  if (x < $(window).width()/2 - 50) {
      // console.log("left");
    $("#cat").attr("src", "")
  if (x > $(window).width()/2 + 50) {
      // console.log("right");
    $("#cat").attr("src", "")
  if (Math.abs(x - $(window).width()/2) < 50) {
    $("#cat").attr("src", "")
  if (x < $(window).width()/2 - 50 && y < $(window).height()/2) {
    $("#cat").attr("src", "")
  if (x > $(window).width()/2 + 50 && y < $(window).height()/2) {
    $("#cat").attr("src", "")