var viewer = new Cesium.Viewer('cesiumContainer');
    var scene = viewer.scene;
    var ellipsoid = scene.globe.ellipsoid;

    var input = {
        id: 'ID1',
        length: 500000,
        topRadius: 300000,
        bottomRadius: 1000
    };


    var myPrimitives = [];

    var instance = new Cesium.GeometryInstance({
        geometry: new Cesium.CylinderOutlineGeometry({
            length: input.length,
            topRadius: input.topRadius,
            bottomRadius: input.bottomRadius,
            slices: 10
        }),
        modelMatrix: Cesium.Matrix4.multiplyByTranslation(Cesium.Transforms.eastNorthUpToFixedFrame(
                Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883)), new Cesium.Cartesian3(0.0, 0.0, 1000000.0), new Cesium.Matrix4()),
        id: input.id,
        attributes: {
            color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.YELLOW)
        }
    });


    function arCylinder(ar){

        if (ar === 'a') {

            var myPrimitive = new Cesium.Primitive({

                geometryInstances: instance,
                appearance: new Cesium.PerInstanceColorAppearance({
                    flat: true
                })
            });


            myPrimitives.push(myPrimitive);
            scene.primitives.add(myPrimitive);

        }

        else if(ar === 'r'){

            scene.primitives.remove(myPrimitives.pop());
        }
    }

    Sandcastle.addToolbarButton('Add', function() {
        arCylinder('a');

    });

    Sandcastle.addToolbarButton('Remove', function() {

        arCylinder('r');
    });