body {
    background-image: url("bg.gif");
    background-repeat: repeat;
}

#border {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    animation: b 5s ease infinite;
    outline-offset: -10px;
    z-index: -1;
}

#tips {
    position: absolute;
    top: 300px;
    width: 100%;
    color: white;
    font-size: 72pt;
    text-align: center;
    white-space: pre-line;
}

@keyframes b {
  0% {
    outline: 10px solid blue;
  }

  50% {
    outline: 10px solid yellow;
  }

  100% {
    outline: 10px solid blue;
  }
}

#line {
    font-size: 42pt;
}

a {
    color: white;
    text-decoration: none;
}

a:hover {
    color: gray;
}