/* kupu-kupu */  
  .butterfly-wrapper {
    position:absolute;
    top:0;
    left:-50;
    pointer-events:none;
  }

  .butterfly {
    width:80%;
    height:140%;
    animation: flap 0.6s ease-in-out infinite;
  }

  @keyframes flap {
    0%,100% { transform: scaleY(1); opacity:0.6;}
    50%     { transform: scaleY(0.7); opacity:0.6;}
  }