var myMsg = msg;
var d = new Date();
var hour = d.getHours();
var cmd = msg.payload;

myMsg.topic = "home/livingrm/cmd"; // MQTT topic
myMsg.payload = "b"; // default state is off

if (cmd==="on") global.set("biglight","on"); // override set to ON
else if (cmd==="off") global.set("biglight","off"); // override set to Off
else if (cmd==="default") global.set("biglight",""); // no override

var override = global.get("biglight");

if (override==="on") {
    myMsg.payload="B"; // force ON state
} else if (override==="off") {
    myMsg.payload="b"; // force OFF state
} else {
    if ((hour>=7) && (hour<12)) myMsg.payload = "B"; //first on period
    else if ((hour>=17) && (hour<22)) myMsg.payload = "B"; //second on period
}

return myMsg;