Display different color for coordinates in ymaps in jQuery

Hi!

How I can change each coordinate by color. For example [55.80, 37.50] is green, [55.70, 37.40] is yellow and etc. 

ymaps.ready(init);

function StrokeColor(res) {
        switch (res) {
            case 1: return "#04630F";
            case 2: return "#FFFF00";
            case 3: return "#A91209";
        }
    }

function init() {

    //Create variable for switch case
    var res = 2;
    // Creating the map.
    var myMap = new ymaps.Map("map", {
            center: [55.72, 37.44],
            zoom: 10
        }, {
            searchControlProvider: 'yandex#search'
        });

    // Creating a polyline using the GeoObject class.
    var myGeoObject = new ymaps.GeoObject({
            // Describing the geometry of the geo object.
            geometry: {
                // The "Polyline" geometry type.
                type: "LineString",
                // Specifying the coordinates of the vertices of the polyline.
                coordinates: [
                    [55.80, 37.50],
                    [55.70, 37.40],
                    [55.60, 37.30],
                    [55.50, 37.20]
                ]
            },
            // Defining properties of the geo object.
            properties:{
                // The contents of the hint.
                hintContent: "I'm a geo object",
                // The contents of the balloon.
                balloonContent: "You can drag me"
            }
        }, {
            /**
             * Setting the geo object options.
             *  Enabling drag-n-drop for the polyline.
             */
            draggable: true,
            // The line color.             
            strokeColor: StrokeColor(res),         
            // Line width.
            strokeWidth: 5
        });    

    // Adding lines to the map.
    myMap.geoObjects
        .add(myGeoObject);
}