<link href="style.css" rel="stylesheet">

<a href="http://www.jydskatomkraft.dk/">
  <button>
    <div class="knap2">
      Tryk på mig
    </div>
  
  </button>
</a>


Arthur Bilde

/* Styles go here */

button {
  background-color: pink;
  border-color:black;
  border-radius:3000px;
  height:350px;
  width:350px;
  font-size: 60px;
}

button:hover {
   background-image:url("https://i.redd.it/nisxqi2zml701.png");
  background-size: cover;
  border-radius:300px;
}
  
button:active {
  background-image:url("https://i.redd.it/nisxqi2zml701.png");
  background-size: cover;
  border-radius:300px;
  
}

button:active > .knap2 {
  display:none;
}

button:hover > .knap2 {
  display:none;
}