<html> <head> <style>.trafficLight{background-color: #777777; width: 150px; padding: 10px;}p{width: 150px; height: 150px; border-radius: 50%;}.red{background-color: #ff0000;}.yellow{background-color: #ffff00;}.green{background-color: #00ff00;}</style> </head> <body> <div class="trafficLight"> <p class="red"></p><p class="yellow"></p><p class="green"></p></div></body></html>]]>