.sparkle {
    position: absolute;
    bottom: 10px;
    left: 10px;
    display: block;
    height: 40px;
    width: 40px;
    background-image: url('../grafica/sparkle.png');
    background-repeat: no-repeat;
    background-position: center;
    background-size: 100% 100%;
    animation-name: sparkle;
    animation-duration: 4s;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
    animation-fill-mode: forwards;
    opacity: 0;
  }
  
  @media (max-width:767px){
  .sparkles{display:none}
  }
  .sparkle--small {
    height: 40px;
    width: 40px;
  }
  
  .sparkle--left {
    animation-name: sparkleLeft;
  }
  
  @keyframes sparkle {
    0% {
      transform: scale(0) rotate(0deg);
      opacity: 1;
    }
    3% {
      transform: scale(1) rotate(15deg);
      opacity: 1;
    }
    6% {
      transform: scale(1) rotate(15deg);
      opacity: 1;
    }
    9% {
      transform: scale(0) rotate(0deg);
      opacity: 1;
    }
    100% {
      transform: scale(0) rotate(0deg);
      opacity: 1;
    }
  }
  @keyframes sparkleLeft {
    0% {
      transform: scale(0) rotate(0deg);
      opacity: 1;
    }
    3% {
      transform: scale(1) rotate(-15deg);
      opacity: 1;
    }
    6% {
      transform: scale(1) rotate(-15deg);
      opacity: 1;
    }
    9% {
      transform: scale(0) rotate(0deg);
      opacity: 1;
    }
    100% {
      transform: scale(0) rotate(0deg);
      opacity: 1;
    }
  }