body {
  margin: 0;
}

.Slider {
  position: relative;
  border: 5px solid #59b42d;
  width: 310px;
  height: 254px;
}

.Slider__Image {
  display: block;
  position: absolute;
  transition: opacity 0.5s ease-in;
}

.Slider__Image + .Slider__Image {
  opacity: 0;
}