.jam {
    background-color: white;
  }
  
  .jam:after {
    content: "";
    display: block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: yellow;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
  }
  
  .jam[data-jam-diatas-715]:after {
    background-color: green;
  }