<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
div.traffic-lights{
display: grid;
background-color: black;
}
div.lights{
border-radius: 50%;
width: 3rem;
height: 3rem;
}
</style>
</head>
<body>
<div id="app" class="traffic-lights">
</div>
<script>
showGreen();
function showGreen(){
show('showYellow', 'grey', 'grey','green')
};
function showYellow(){
show('showRed', 'grey', 'yellow', 'grey')
};
function showRedYellow(){
show('showGreen','red','yellow','grey')
};
function showRed(){
show('showRedYellow','red','grey','grey')
};
function show(onclickFunc ,lamp1, lamp2, lamp3) {
document.getElementById('app').innerHTML = /*HTML*/ `
<div id="trafficLights" onclick="${onclickFunc}()">
${createLampHtml(lamp1)}
${createLampHtml(lamp2)}
${createLampHtml(lamp3)}
</div>
`;
};
function createLampHtml(color){
return /*HTML*/ `
<div class="lights" style="background-color: ${color};"></div>
`;
};
</script>
</body>
</html>