LED/Traffic-light.html

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
<title>Traffic light</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script src="https://webduino.io/components/webduino-js/dist/webduino-all.min.js"></script>
<script src="https://blockly.webduino.io/webduino-blockly.js"></script>
<script src="https://blockly.webduino.io/lib/runtime.min.js"></script>
<style>
#light img {height: 200px; display: none;}
#light.off #light_off, #light.on #light_on {display: inline-block;}
</style>
</head>

<body>
<div id="light" class="off">
    <img src="../image/light-off.jpg" id="light_off">
    <img src="../image/light-on.jpg" id="light_on">
</div>

<script>
var led_red, led_yellow, led_green;
var light = document.getElementById("light");

(async function () {
    boardReady({device: 'wa8w'}, async board => {
        board.systemReset();
        board.samplingInterval = 250;
        led_red = getLed(board, 10);
        led_yellow = getLed(board, 11);
        led_green = getLed(board, 7);
        led_red.off();
        led_yellow.off();
        led_green.on();
        light.className = "off";
        light.addEventListener("click", Traffic_Light);
    });
}());

async function Traffic_Light() {
    if (light.className == "off") {
        await delay(2);
        led_red.off();
        led_yellow.on();
        led_green.off();
        await delay(2);
        led_red.on();
        led_yellow.off();
        led_green.off();
        light.className = "on";
    } else {
        await delay(2);
        led_red.off();
        led_yellow.off();
        led_green.on();
        light.className = "off";
    }
}
</script>
</body>