<center>
<input type="button" name="button1" value="Rood" onClick="document.bgColor='red'">
<input type="button" name="button2" value="Geel" onClick="document.bgColor='yellow'">
<input type="button" name="button3" value="Blauw" onClick="document.bgColor='blue'">
<input type="button" name="button4" value="Groen" onClick="document.bgColor='green'">
<input type="button" name="button5" value="Verander terug" onClick="document.bgColor='white'">
</center>