JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <title>Hello World!</title>
    <script src="Cesium/Cesium.js"></script>
    <style>
        @import url(Cesium/Widgets/widgets.css);
        #cesiumContainer {
            position: absolute;
            top: 0;
            left: 0;
            height: 100%;
            width: 100%;
            margin: 0;
            overflow: hidden;
            padding: 0;
            font-family: sans-serif;
        }

        html {
            height: 100%;
        }

        body {
            padding: 0;
            margin: 0;
            overflow: hidden;
            height: 100%;
        }
    </style>
</head>
    <body>
    <div id="cesiumContainer"></div>
    <script src="js/test.js"></script>
    </body>
</html>

JavaScript

//test.js

if (typeof Cesium !== "undefined") {
    startup(Cesium);
} else if (typeof require === "function") {
    require(["Cesium"], startup);
}
var viewer;
var pipesManager;

function startup(Cesium) {
    viewer = new Cesium.Viewer('cesiumContainer');
    viewer.scene.globe.depthTestAgainstTerrain = false;

    var positions = [Cesium.Cartesian3.fromDegrees(15, 80, -20), Cesium.Cartesian3.fromDegrees(15.5, 80, -20)];

    var instance = new Cesium.GeometryInstance({
        geometry : new Cesium.PolylineVolumeGeometry({
            vertexFormat : Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
            polylinePositions : positions,
            shapePositions: computeCircle(5, 8)
        }),
        attributes : {
            color : Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.RED)
        }
    });

    var primitive = new Cesium.Primitive({
        geometryInstances : instance,
        appearance : new Cesium.PerInstanceColorAppearance({
            translucent : false
        })
    });
    viewer.scene.primitives.add(primitive);

    function computeCircle(radius, definition) {
        var positions = [];
        var step = 360/definition;
        for (var i = 0; i < 360; i+=step) {
            var radians = Cesium.Math.toRadians(i);
            positions.push(new Cesium.Cartesian2(radius * Math.cos(radians), radius * Math.sin(radians)));
        }
        return positions;
    }

    var cameraPos = new Cesium.Cartesian3(1073639.7144648745, 287480.1251882551, 6259649.849894111);
    var direction = new Cesium.Cartesian3(-0.6622673000198468, 0.7188684383273912, -0.21125858965060018);
    var up = new Cesium.Cartesian3(-0.022334456192881352, 0.2628879618773839, 0.964567826317295);
    viewer.scene.camera.flyTo({
        destination: cameraPos,
        duration: 0,
        orientation: {
            direction: direction,
            up: up
        }
    });
}