nested containers

function onGLC(glc) {
    glc.loop();
    glc.size(500, 500);
     glc.setDuration(5);
//     glc.setFPS(20);
   //  glc.setMode('single');
     //glc.setEasing(false);
    glc.styles.backgroundColor = "#005";
    var list = glc.renderList,
        width = glc.w,
        height = glc.h,
        color = glc.color;
    var numStars = 150;

      var container = list.addContainer({
        x: width / 2,
        y: height / 2,
        rotation: [0, 30]
    });
    for(var i = 0; i<numStars; i++) {
        x= Math.cos(2 * Math.PI * i / numStars) * 100;
        y= Math.sin(2 * Math.PI * i / numStars) * 100;
        var subContainer = list.addContainer({
            x: x,
            y: y,
            parent: container,
            rotation: [0,360],
            phase: i*0.01
            })
        x= Math.cos(2 * Math.PI * i / numStars) * 30;
        y= Math.sin(2 * Math.PI * i / numStars) * 30;
        list.addStar({
            x: x,
            y: y,
            fill: true,
            fillStyle: glc.color.rgb(255,0,0),
            stroke: true,
            strokeStyle: glc.color.rgb(100,0,100),
            lineWidth: 3,
            outerRadius: 50,
            innerRadius: 25,
            points: 5,
            rotation: [0, 360],
            parent:subContainer,
            phase: i*0.001
    });
    }
}