.new-year-button {
    position: relative;
    overflow: hidden;
  }
  
  .new-year-button::before {
    content: "";
    position: absolute;
    top: -10px;
    right: -10px;
    width: 30px;
    height: 30px;
    background-color: #FF0000;
    border-radius: 50%;
    z-index: 1;
  }
  
  .new-year-button::after {
    content: "";
    position: absolute;
    top: -15px;
    right: -5px;
    border-style: solid;
    border-width: 0 10px 10px 10px;
    border-color: transparent transparent #FF0000 transparent;
    z-index: 1;
  }