double lines

function onGLC(glc) {
    glc.loop();
    glc.size(400, 300);
    glc.setDuration(3);
    glc.setFPS(15);
    // glc.setMode("single");
    // glc.setEasing(false);
    glc.setMaxColors(30);
    glc.styles.backgroundColor = "black";
    var list = glc.renderList,
        width = glc.w,
        height = glc.h,
        color = glc.color;
    var lmargin = -100,
        topOffset = 80,
        bottomOffset = 20;
    for (var i = 0; i < width; i++) {
        list.addLine({
            lineWidth: 2,
            strokeStyle: ["red","blue"],
            x0: [i*2+lmargin,i-topOffset],
            y0: [125,0],
            x1: [i*2+lmargin,i+bottomOffset],
            y1: [height-20,height],
            phase: i*0.004
        })
        list.addLine({
            lineWidth: 1,
            strokeStyle: ["yellow","magenta"],
            x0: [i+lmargin-100,i*2-topOffset],
            y0: [0,100],
            x1: [i+lmargin,i*2+bottomOffset],
            y1: [height,height-50],
            phase: i*0.002
        })
    };
}