#log {
    background: #000;
    height: 400px;
    overflow: auto;
    width: 300px;
}
#log p {
  border-bottom: 1px solid #ccc;
  margin: 0;
  color: #fff;
  font-size: 13px;
  padding: 0 15px;
  visibility: visible;
  transition: all 0.5s ease-in-out;
}
#log p.fade {
  visibility: hidden;
  transition: all 0.5s ease-in-out;
}