for (int i = abf.sweepCount - 1; i >= 0; i--)
{
    double frac = (double)i / (abf.sweepCount - 1);
    Color color = Mix("#8181f2", "#a2f0ca", frac);
    var trace = abf.GetSweep(i);
    plt.PlotSignal(
        ys: trace.values,
        sampleRate: trace.sampleRate,
        color: color,
        yOffset: i * 15,
        xOffset: i * .025, 
        maxRenderIndex: 20000, lineWidth: 2);
}

// hack-in an L-shaped scalebar until ScottPlot supports it natively
plt.PlotLine(1.15, -50, 1.25, -50, lineWidth: 2, color: Color.Black);
plt.PlotLine(1.25, -50, 1.25, -10, lineWidth: 2, color: Color.Black);
plt.PlotText("100 ms", 1.2, -50, color: Color.Black, fontSize: 16,
    alignment: ScottPlot.TextAlignment.upperCenter);
plt.PlotText("40 mV", 1.25, -58, color: Color.Black, fontSize: 16, rotation: -90);

plt.Grid(false);
plt.Ticks(false, false);
plt.Frame(false);
plt.Resize(800, 600);