/* Flash class and keyframe animation */
.flashit{
      -webkit-animation: flash linear 1s infinite;
      animation: flash linear 1s infinite;
  }
  @-webkit-keyframes flash {
      0% { opacity: 1; } 
      50% { opacity: .1; } 
      100% { opacity: 1; }
  }
  @keyframes flash {
      0% { opacity: 1; } 
      50% { opacity: .1; } 
      100% { opacity: 1; }
  }