color shift

function onGLC(glc) {
    glc.loop();
    // glc.size(400, 400);
    glc.setDuration(5);
    // glc.setFPS(20);
    // glc.setMode("single");
    // glc.setEasing(false);
    // glc.setMaxColors(256);
        glc.styles.backgroundColor = "white";
    var list = glc.renderList,
        width = glc.w,
        height = glc.h,
        color = glc.color;
        var rowHeight = 100;
    for (var i = 0; i < height; i+=rowHeight) {
        for (var j = 0; j < width; j+=100) {
            // var x1 = (Math.random()*width)-100;
            list.addRect({
                x: [j,j + Math.random()*width-width/2],
                y: i,
                // w: Math.random()*100+50,
                w: 100,
                h: rowHeight,
                fillStyle: color.hsva(Math.random()*360,1,1,0.4),
                drawFromCenter: false,
                phase: i*0.1
            })
        };
    };

}