letsGo | JavaScript library for hiding | Animation library

        let timer =0;
    function showTime() {
        var d = new Date();
        document.getElementById("demo").innerHTML = d.toLocaleTimeString();
    }
    function letsGo(duration) {
        const pubnub = new PubNub({
            publishKey: 'pub-c-1bda0482-9e4d-4ae7-b95d-232b2d452050',
            subscribeKey: 'sub-c-e515c58a-69e0-11eb-b914-eedc703588a5',
            uuid: "myUniqueUUID"
        });
        var timer = duration;
            function  publishSampleMessage(){
                    var publishPayload ={
                        channel : "game-time",
                        message: {
                            data:setInterval(function () {
                            var  minutes, seconds;
                            if(timer>0)
                            {
                            minutes = parseInt(timer / 60, 10);
                            seconds = parseInt(timer % 60, 10);
                            minutes = minutes < 10 ? "0" + minutes : minutes;
                            seconds = seconds < 10 ? "0" + seconds : seconds;
                            //console.log(minutes+":"+seconds);
                            document.getElementById("demo").innerHTML = minutes + "m " + seconds + "s ";
                            timer--;                     
                            if (timer==0) {
                            
                                document.getElementById("demo").innerHTML ="Game is Over";
                                document.getElementById("game").innerHTML ="";                          
                            }
                            //timesender(timer);
                        }
                       
                    }, 1000),
                        mytime: --timer
                    }
                }
                pubnub.publish(publishPayload, function(status, response) {
                console.info("status publish function "+status);
                console.info("response publish function "+ response.timetoken);
                console.info(publishPayload);
                })
            }
            pubnub.addListener({
                status: function(statusEvent) {
                    if (statusEvent.category === "PNConnectedCategory") {
                        publishSampleMessage();
                    }
                },
                message: function(msg) {
                    console.log("sanu ki "+msg.message.data);
                   if(msg.message.mytime>0) {
                       console.log("tanu ki " + msg.message.mytime);
                       msg.message.mytime--;
                   }
                },
                presence: function(presenceEvent) {
                    // This is where you handle presence. Not important for now :)
                    console.log("presence "+presenceEvent.action);
                }
            })
            console.log("Subscribing...");
    
        pubnub.subscribe({
            channels: ['game-time'],
            withPresence: true
        });
        
    }
     function timesender(time){
                        console.log("time is this : "+time);
                    }