Random RGB

var output_entity = "light.bedroom_lights";
var r = Math.floor(Math.random() * 256);
var g = Math.floor(Math.random() * 256);
var b = Math.floor(Math.random() * 256);
var rgb_out = [r,g,b];

// Payload to be passed to service call node
msg.payload = {domain: "light", service: "turn_on",
    data: {
        entity_id: output_entity,
        rgb_color: rgb_out,
        transition: 1, }
    };
    node.status({text: rgb_out});
return msg;