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function onGLC(glc) {
    glc.loop();
    // glc.playOnce();
    glc.size(540, 540);
    glc.setDuration(2.5);
    glc.setFPS(25);
    // glc.setMode("single");
    // glc.setEasing(false);

    var list = glc.renderList,
        width = glc.w,
        height = glc.h,
        color = glc.color;

    // your code goes here:

    var gradient = color.createLinearGradient(0, -height/2, 0, height/2);
    gradient.addColorStop(0, "#C04848");
    gradient.addColorStop(1, "#480048");

    list.addRect({
        x:width/2,
        y:height/2,
        w:width,
        h:height,
        fillStyle: gradient
    });


    var num = 50;
    for (var i=0; i<num; i++) {
        list.addOval({
            x: width/2,
            y: [height*.3, height*.7],
            rx: 20+i*3,
            ry: (20+i*3)/2,
            lineWidth: 1,
            strokeStyle: "rgba(255,255,255,.5)",
            fill: false,
            stroke: true,
            lineWidth: 1,
            phase: .35/num*i
        });
    }
}