.sour-container {
  position: absolute;
  text-align: center;
  top: 0;
  left: 0;
  width: 100%;
}

.sour-image-container {
  margin-left: auto;
  margin-right: auto;
  position: relative;
  width: 300px;
  height: 300px;
}

.image {
  width: 100%;
  opacity: 0;
}

.active .image {
  opacity: 1;
}