如何揭示选择

Question

写一个非常简单的石头剪刀游戏。我需要它来揭示计算机选择，因此用户在做出选择之前就知道了。我还需要关闭循环中的区分大小写。有人可以帮帮我吗？

#fullpage {
  background-attachment: fixed;
  background-repeat: no-repeat;
}

<div id="fullpage">
     <video autoplay loop muted id="myVideo">
            <source src="video/empty.mp4" type="video/mp4">
            <source src="video/empty.webm" type="video/webm">
      </video>
</div>





#myVideo{
        position: fixed;
        right: 0;
        bottom: 0;
        top:0;
        right:0;
        width: 100%;
        height: 100%;
        background-size: 100% 100%;
        background-color: black; 
        background-image: /* our video */;
        background-position: center ;
        background-size: cover;
        object-fit: cover; 
        z-index: -1;
        overflow: hidden
}