<!DOCTYPE html> <html> <head> <title>bulb on off</title> </head> <body bgcolor="#181717"> <button onclick="document.getElementById('bulb') .src='bulbon.png'">ON</button> <img id="bulb" src="bulb.png" width="200"> <button onclick="document.getElementById('bulb') .src='bulb.png'">OFF</button> </body> </html>
