.picture1 img, .picture2 img {
  height: 200px;
  width: 200px;
  display: inline-block;
}

.thumbnail {
  text-align: center;
}

.picture2 {
    display: none;
}

.thumbnail:hover .picture1 {
    display: none;
}
.thumbnail:hover .picture2 {
    display: block;
}



.animate-character
{
  text-transform: uppercase;
  background-image: linear-gradient(90deg, rgba(0, 142, 193, 0.674) 0%, rgba(221, 86, 13, 0.718) 45%, rgba(44, 132, 148, 0.723)100%);
  background-size: auto auto;
  background-clip: border-box;
  background-size: 200% auto;
  color: #fff;
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: textclip 5s linear infinite;
  display: inline-block;
  font-size: 40px;
  font: bold;
}

@keyframes textclip {
  to {
    background-position: 200% center;
  }
}