Animated bullet at the end of the series

<!-- Styles -->
<style>
#chartdiv {
  width: 100%;
  height: 500px;
}

</style>

<!-- Resources -->
<script src="https://cdn.amcharts.com/lib/4/core.js"></script>
<script src="https://cdn.amcharts.com/lib/4/charts.js"></script>
<script src="https://cdn.amcharts.com/lib/4/themes/animated.js"></script>

<!-- Chart code -->
<script>
am4core.ready(function() {

// Themes begin
am4core.useTheme(am4themes_animated);
// Themes end

var chart = am4core.create("chartdiv", am4charts.XYChart);

// Add data
chart.data = [{
  "date": new Date(2018, 3, 20),
  "value": 90
}, {
  "date": new Date(2018, 3, 21),
  "value": 102
}, {
  "date": new Date(2018, 3, 22),
  "value": 65
}, {
  "date": new Date(2018, 3, 23),
  "value": 62
}, {
  "date": new Date(2018, 3, 24),
  "value": 55
}, {
  "date": new Date(2018, 3, 25),
  "value": 81,
  "disabled": false
}];

// Create axes
var dateAxis = chart.xAxes.push(new am4charts.DateAxis());

// Create value axis
var valueAxis = chart.yAxes.push(new am4charts.ValueAxis());

// Create series
var lineSeries = chart.series.push(new am4charts.LineSeries());
lineSeries.dataFields.valueY = "value";
lineSeries.dataFields.dateX = "date";
lineSeries.name = "Sales";
lineSeries.strokeWidth = 3;
lineSeries.strokeDasharray = "5,4";

// Add simple bullet
var bullet = lineSeries.bullets.push(new am4charts.CircleBullet());
bullet.disabled = true;
bullet.propertyFields.disabled = "disabled";

var secondCircle = bullet.createChild(am4core.Circle);
secondCircle.radius = 6;
secondCircle.fill = chart.colors.getIndex(8);


bullet.events.on("inited", function(event){
  animateBullet(event.target.circle);
})


function animateBullet(bullet) {
    var animation = bullet.animate([{ property: "scale", from: 1, to: 5 }, { property: "opacity", from: 1, to: 0 }], 1000, am4core.ease.circleOut);
    animation.events.on("animationended", function(event){
      animateBullet(event.target.object);
    })
}


}); // end am4core.ready()
</script>

<!-- HTML -->
<div id="chartdiv"></div>

/* Imports */
import * as am4core from "@amcharts/amcharts4/core";
import * as am4charts from "@amcharts/amcharts4/charts";
import am4themes_animated from "@amcharts/amcharts4/themes/animated";

/* Chart code */
// Themes begin
am4core.useTheme(am4themes_animated);
// Themes end

let chart = am4core.create("chartdiv", am4charts.XYChart);

// Add data
chart.data = [{
  "date": new Date(2018, 3, 20),
  "value": 90
}, {
  "date": new Date(2018, 3, 21),
  "value": 102
}, {
  "date": new Date(2018, 3, 22),
  "value": 65
}, {
  "date": new Date(2018, 3, 23),
  "value": 62
}, {
  "date": new Date(2018, 3, 24),
  "value": 55
}, {
  "date": new Date(2018, 3, 25),
  "value": 81,
  "disabled": false
}];

// Create axes
let dateAxis = chart.xAxes.push(new am4charts.DateAxis());

// Create value axis
let valueAxis = chart.yAxes.push(new am4charts.ValueAxis());

// Create series
let lineSeries = chart.series.push(new am4charts.LineSeries());
lineSeries.dataFields.valueY = "value";
lineSeries.dataFields.dateX = "date";
lineSeries.name = "Sales";
lineSeries.strokeWidth = 3;
lineSeries.strokeDasharray = "5,4";

// Add simple bullet
let bullet = lineSeries.bullets.push(new am4charts.CircleBullet());
bullet.disabled = true;
bullet.propertyFields.disabled = "disabled";

let secondCircle = bullet.createChild(am4core.Circle);
secondCircle.radius = 6;
secondCircle.fill = chart.colors.getIndex(8);


bullet.events.on("inited", function(event){
  animateBullet(event.target.circle);
})


function animateBullet(bullet) {
    let animation = bullet.animate([{ property: "scale", from: 1, to: 5 }, { property: "opacity", from: 1, to: 0 }], 1000, am4core.ease.circleOut);
    animation.events.on("animationended", function(event){
      animateBullet(event.target.object);
    })
}