Interfacing Proximity sensor with BOLT such that buzzer rings when something is near the sensor and not otherwise

Development
1
Bolt IoT Platform 
    <script>
    setKey('{{ApiKey}}','{{Name}}');
    </script>
</head>
<body>
    <center>
    <button onclick="digitalRead(0);" buzz();>READ</button>
    </center>
</body>
2

@krishadu97 please share the complete code.
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