birds

function onGLC(glc) {
    glc.loop();
    glc.size(350, 350);
    glc.setDuration(4);
    glc.setFPS(20);
    // glc.setMode("single");
    // glc.setEasing(false);
    glc.setMaxColors(20);
    // glc.styles.backgroundColor = "black";
    var list = glc.renderList,
        width = glc.w,
        height = glc.h,
        color = glc.color;

    list.addRect({
        x: width/2,
        y: height/2,
        w: width,
        h: height,
        fillStyle: ["red","yellow"]
    })

    var num=15;
    for (var k = 0; k < 5; k++) {
         for(var j=0;j<5;j++){
                var offset1 = Math.random() * 300 - 150;
                var offset2 = Math.random() * 300 - 150;
                var y = 60 + 40 * (k+1)+ verticalOffset;
            for (var i=0; i<num; i++) {
                var verticalOffset = Math.random() * 30 - 15;
                var x = 60 +40 * j + 3*(i+1);
                list.addLine({
                    lineWidth: 1,
                    strokeStyle: ["yellow","red"],
                    x0: x,
                    y0: y,
                    x1: [x + offset1, x + offset2],
                    y1: [y + offset1, y - offset2],
                    phase: i*0.01
                });
            }
        };
    }
 }