Version 0.0.4 (ha!)
<script>   let mySound1 = new Audio('wl_completion_sound.13a69e47a3545eb5ac81.mp3') </script>

<h1 align=center>testing board</h1>

<b onClick="{
    mySound1.play()
    alert('Did you hear a sound?')
}"> This is bold<br>and several<br> lines<br> Click it to hear a sound!</b> <br> <br>

Change the following: <input type=text value=5 onChange="{
   alert('Value changed to: '+this.value)
}">