burst

function onGLC(glc) {
    glc.loop();
    // glc.playOnce();
    glc.size(540, 540);
    glc.setDuration(2);
    glc.setFPS(30);
    glc.setMode("single");
    glc.styles.backgroundColor = "white";
    // glc.setEasing(false);

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

    var rad = 150, num = 20, TWO_PI = Math.PI*2;

    var gradient = color.createRadialGradient(0, 0, 0, 0, 0, rad);
    gradient.addColorStop(1, "#304352");
    gradient.addColorStop(0, "#d7d2cc");

    // your code goes here:
    for (var i=0; i<num; i++) {
        var start = 360.0/num*i,
            end = 360.0/num*(i+1);
        var px = width/2 + Math.cos(TWO_PI/num*(i+0.5))*width*.8,
            py = height/2 + Math.sin(TWO_PI/num*(i+0.5))*height*.8;
        list.addCircle({
            x: [width/2,px],
            y: [height/2,py],
            radius: rad,
            rotation: [0,90],
            startAngle: start,
            endAngle: end,
            drawFromCenter: true,
            fillStyle: gradient,

        });
    }

    list.addCircle({
        x: width/2,
        y: height/2,
        radius: [0,rad],
        fillStyle: gradient

    });

}