Rock Paper Scissor

You can make the spotlight effect for the winner coin by using radial-gradient() as the background of a pseudo-element, here's an example:

.coin {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 200px;
  height: 200px;
  background-color: #f00;
  border-radius: 100%;
  z-index: 1;
}

.coin::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  height: 260%;
  width: 260%;
  background: 
    radial-gradient(circle,
      hsla(0,0%,100%,.08) 40%,
      hsla(0,0%,100%,.04) 40%,
      hsla(0,0%,100%,.04) 55%,
      hsla(0,0%,100%,.02) 55%
    );
  border-radius: 100%;
  transform: translate(-50%,-50%);
  transform-origin: 0 0; /* Useful when animating with scale() */ 
  z-index: -1;  
}

You can learn more about hard stop gradients on: https://css-tricks.com/books/greatest-css-tricks/hard-stop-gradients/

Hope you find this useful 👍