var materialEntityName = MyAvatar.displayName + "-Avatar-Material-Entity";
var MATERIAL_JSON = "URL TO YOUR MATERIAL HERE!!";

var createAvatarMaterialEntity = function (name) {

    return Entities.addEntity({
        type: "Material",
        name: name,
        position: MyAvatar.position,
        userData: "",
        materialURL: MATERIAL_JSON,
        scale: {
            x: 1,
            y: 1,
            z: 1
        },
        priority: 1,
        parentMaterialName: "mat::Material",
        parentID: MyAvatar.sessionUUID
    }, true)

}

var clearAllMaterialEntities = function () {
    var entities = Entities.findEntities(MyAvatar.position, 10);
    if (entities.length > 0) {
        for (var index in entities) {
            var entity = Entities.getEntityProperties(entities[index]);
            if (entity.clientOnly &&
                entity.type === "Material" &&
                entity.owningAvatarID === MyAvatar.sessionUUID &&
                entity.name.indexOf("Avatar-Material-Entity") !== -1) {

                Entities.deleteEntity(entity.id);
                console.log("Found a potential Avatar Material Entity. Removing it.")
            }
        }
    }
}

clearAllMaterialEntities();

var materialEntity;
materialEntity = createAvatarMaterialEntity(materialEntityName);

console.log("Created materialEntity", materialEntity);

var FPSThrottle = 1 / 24;
var timer = 0;
var currentTimer = 0;
var update = function (dt) {
    timer += dt;
    if (timer > FPSThrottle) {
        currentTimer += dt; // Illusion update

        var posX = Math.cos(currentTimer * 0.02) + 0.05;
        var posY = Math.sin(currentTimer * 0.01) + 0.05;
        var scaleX = Math.abs(2.0 * Math.sin(currentTimer * 0.01)) + 0.1;
        var scaleY = Math.abs(2.0 * Math.sin(currentTimer * 0.01)) + 0.1;
        var rot = Math.sin(currentTimer * -0.2) * 360

        Entities.editEntity(materialEntity, {
            materialMappingPos: {
                x: posX,
                y: posY
            },
            materialMappingScale: {
                x: scaleX,
                y: scaleY
            },
            materialMappingRot: rot
        });

        timer = 0;
    }
    // TODO: Throttle Entitity update to 24 fpsw
}

Script.update.connect(update);
Script.scriptEnding.connect(function () {
    Script.update.disconnect(update);
    clearAllMaterialEntities();
});