def METHOD_NAME(vLow, vUp, n_test):
    """
    From two lists containing the lower and upper bounds of the region,
    create a PolygonArray.
    """
    palette = ot.Drawable.BuildDefaultPalette(2)
    myPaletteColor = palette[1]
    polyData = [[vLow[i], vLow[i + 1], vUp[i + 1], vUp[i]] for i in range(n_test - 1)]
    polygonList = [
        ot.Polygon(polyData[i], myPaletteColor, myPaletteColor)
        for i in range(n_test - 1)
    ]
    boundsPoly = ot.PolygonArray(polygonList)
    boundsPoly.setLegend("95% bounds")
    return boundsPoly