HTML Coin Flip

<button type="button" onclick="myFunction1()" id="Coin">CLick ME</button>
<script>
  function myFunction1() {
    var x = Math.floor(Math.random() * 2);
    console.log(x);
    if (x == 0) {
      document.getElementById("Coin").innerHTML = "HEADS";
    } else {
      document.getElementById("Coin").innerHTML = "TAILS";
    }
  }

  myFunction1();
</script>