div.image_slider{
  position: relative;
  margin: auto;
  max-width: 600px;
}

div.image_slider img{
  display: inline-block;
  max-width: 100%;
  max-height: 500px;
  display: none;
}

a.image_slider_change_button{
  position: absolute;
  top: 40%;
  transition: background-color .5s ease;
  padding: 30px 10px 30px 10px;
  border-radius: 5px;
}

a.image_slider_change_button:hover{
  background-color: grey;
}

a#right_slider_change{
  right: -5%;
}

a#left_slider_change{
  left: -5%;
}