How to use the @amcharts/amcharts4/core.useTheme function in @amcharts/amcharts4

"Jannette",
  "Tyrell",
  "Sheena",
  "Maranda",
  "Briana"
];


for (let i = 0; i < names.length; i++) {
  value1 += Math.round((Math.random() < 0.5 ? 1 : -1) * Math.random() * 5);
  value2 += Math.round((Math.random() < 0.5 ? 1 : -1) * Math.random() * 5);
  value3 += Math.round((Math.random() < 0.5 ? 1 : -1) * Math.random() * 5);
  data.push({ category: names[i], value1: value1, value2:value2, value3:value3 });
}

am4core.useTheme(am4themes_animated);

let interfaceColors = new am4core.InterfaceColorSet();

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

chart.data = data;
// the following line makes value axes to be arranged vertically.
chart.bottomAxesContainer.layout = "horizontal";
chart.bottomAxesContainer.reverseOrder = true;
chart.arrangeTooltips = false;

let categoryAxis = chart.yAxes.push(new am4charts.CategoryAxis());
categoryAxis.dataFields.category = "category";
categoryAxis.renderer.grid.template.stroke = interfaceColors.getFor("background");
categoryAxis.renderer.grid.template.strokeOpacity = 1;
categoryAxis.renderer.grid.template.location = 1;

import * as am4core from "@amcharts/amcharts4/core";
import * as am4charts from "@amcharts/amcharts4/charts";
import am4themes_animated from "@amcharts/amcharts4/themes/animated";
import * as am4plugins_forceDirected from "@amcharts/amcharts4/plugins/forceDirected";

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

let chart = am4core.create("chartdiv", am4plugins_forceDirected.ForceDirectedTree);

let networkSeries = chart.series.push(new am4plugins_forceDirected.ForceDirectedSeries())
networkSeries.dataFields.linkWith = "linkWith";
networkSeries.dataFields.name = "name";
networkSeries.dataFields.id = "name";
networkSeries.dataFields.value = "value";
networkSeries.dataFields.children = "children";

networkSeries.nodes.template.label.text = "{name}"
networkSeries.fontSize = 8;
networkSeries.linkWithStrength = 0;

let nodeTemplate = networkSeries.nodes.template;

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

am4core.useTheme(am4themes_animated);

var data = [{
	"country": "Lithuania",
	"units": 500,
	"pie": [{
		"value": 250,
		"title": "Cat #1"
	}, {
		"value": 150,
		"title": "Cat #2"
	}, {
		"value": 100,
		"title": "Cat #3"
	}]
}, {
	"country": "Czech Republic",

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

am4core.useTheme(am4themes_animated);

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

let xAxis = chart.xAxes.push(new am4charts.CategoryAxis());
let yAxis = chart.yAxes.push(new am4charts.CategoryAxis());

xAxis.dataFields.category = "weekday";
yAxis.dataFields.category = "hour";

xAxis.renderer.grid.template.disabled = true;
xAxis.renderer.minGridDistance = 40;

yAxis.renderer.grid.template.disabled = true;
yAxis.renderer.inversed = true;
yAxis.renderer.minGridDistance = 30;

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

am4core.useTheme(am4themes_animated);

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

let data = [];
let open = 100;
let close = 250;

for (let i = 1; i < 366; i++) {
	open += Math.round((Math.random() < 0.5 ? 1 : -1) * Math.random() * 50);
	close += Math.round((Math.random() < 0.5 ? 1 : -1) * Math.random() * 50);
	data.push({ date: new Date(2018, 0, i), open: open, close: close });
}

chart.data = data;

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

import React, { Component } from 'react';
import * as am4core from '@amcharts/amcharts4/core';
import * as am4charts from '@amcharts/amcharts4/charts';
import am4themes_animated from '@amcharts/amcharts4/themes/animated';

am4core.useTheme(am4themes_animated);

function generateStringColor(string) {
  const num = hashCode(string);
  return intToRGB(num);
}
function intToRGB(i) {
  const c = (i & 0x00ffffff).toString(16).toUpperCase();

  return '00000'.substring(0, 6 - c.length) + c;
}
function hashCode(str) {
  let hash = 0;
  for (let i = 0; i < str.length; i++) {
    hash = str.charCodeAt(i) + ((hash << 5) - hash);
  }
  return hash;

import * as am4core from "@amcharts/amcharts4/core";
import * as am4charts from "@amcharts/amcharts4/charts";
import am4themes_animated from "@amcharts/amcharts4/themes/animated";
import am4themes_dark from "@amcharts/amcharts4/themes/dark";

am4core.useTheme(am4themes_animated);
am4core.useTheme(am4themes_dark);

let chart = am4core.create("chartdiv", am4charts.XYChart);
chart.paddingRight = 20;

let dateAxis = chart.xAxes.push(new am4charts.DateAxis());
dateAxis.renderer.grid.template.location = 0;

let valueAxis = chart.yAxes.push(new am4charts.ValueAxis());
valueAxis.tooltip.disabled = true;

let series = chart.series.push(new am4charts.OHLCSeries());
series.dataFields.dateX = "date";
series.dataFields.valueY = "close";
series.dataFields.openValueY = "open";
series.dataFields.lowValueY = "low";

import * as am4core from "@amcharts/amcharts4/core";
import * as am4maps from "@amcharts/amcharts4/maps";
import am4themes_animated from "@amcharts/amcharts4/themes/animated";
import am4geodata_worldHigh from "@amcharts/amcharts4-geodata/worldHigh";

am4core.useTheme(am4themes_animated);

var countryCodes = ["AF", "AO", "AR", "AM", "AU", "AT", "AZ", "BD", "BY", "BE", "BO", "BA", "BW", "BR", "BG", "KH", "CM", "CA", "CF", "TD", "CL", "CN", "CO", "CG", "CD", "CR", "CI", "HR", "CU", "CY", "CZ", "DK", "EC", "EG", "ER", "EE", "ET", "FI", "FR", "GE", "DE", "GR", "GL", "GP", "GT", "GN", "GW", "GY", "HT", "HN", "HU", "IS", "IN", "ID", "IR", "IQ", "IE", "IL", "IT", "JM", "JP", "JO", "KZ", "KE", "KP", "KR", "KG", "LA", "LV", "LB", "LS", "LR", "LY", "LT", "LU", "MK", "MG", "MY", "ML", "MT", "MR", "MX", "MD", "MN", "ME", "MA", "MZ", "MM", "NA", "NP", "NL", "NZ", "NI", "NE", "NG", "NO", "OM", "PK", "PA", "PG", "PY", "PE", "PH", "PL", "PT", "RO", "RU", "SA", "SN", "RS", "SK", "SI", "SO", "ZA", "SS", "ES", "SD", "SE", "CH", "SY", "TW", "TJ", "TZ", "TH", "TN", "TR", "TM", "UA", "AE", "GB", "US", "UY", "UZ", "VE", "VN", "YE", "ZM", "ZW"];

var chart = am4core.create("chartdiv", am4maps.MapChart);


try {
	chart.geodata = am4geodata_worldHigh;
}
catch (e) {
	chart.raiseCriticalError(new Error("Map geodata could not be loaded. Please download the latest <a href="\&quot;https://www.amcharts.com/download/download-v4/\&quot;">amcharts geodata</a> and extract its contents into the same directory as your amCharts files."));
}

chart.projection = new am4maps.projections.Mercator();
chart.padding(0, 20, 0, 20);
chart.minZoomLevel = 0.9;

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

am4core.useTheme(am4themes_animated);

let chart = am4core.create("chartdiv", am4charts.XYChart3D);


chart.data = [{
    "country": "USA",
    "visits": 3025
}, {
    "country": "China",
    "visits": 1882
}, {
    "country": "Japan",
    "visits": 1809
}, {
    "country": "Germany",
    "visits": 1322

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

am4core.useTheme(am4themes_animated);

let chart = am4core.create("chartdiv", am4charts.XYChart3D);

chart.data = [{
    "country": "USA",
    "visits": 3025
}, {
    "country": "China",
    "visits": 1882
}, {
    "country": "Japan",
    "visits": 1809
}, {
    "country": "Germany",
    "visits": 1322
}, {