def generate_styles(doc):
    colors = [
        'ffd18802',
        'ff2f8b55',
        'ff00d6ff',
        'ff1427a5',
        'ff7e231a',
        'ff2f8b55',
    ]
    for idx, color in enumerate(colors):
        styles[idx + 1] = []
        for i in range(0, 19):
            color_id = '{}{}{}'.format(color[6:8], color[4:6],
                                       color[2:4]).capitalize()
            style_normal = KML.Style(KML.IconStyle(
                KML.scale(1.0),
                KML.color(color),
                KML.Icon(KML.href("images/icon-{}.png".format(i + 1)), ),
            ),
                                     KML.LabelStyle(KML.scale(0.0)),
                                     KML.BallonStyle(KML.text('FIXME')),
                                     id="icon-seq2-{}-{}-{}-normal".format(
                                         i, idx, color_id))
            doc.append(style_normal)
            #styles.append(style_normal.get('id'))

            style_highlight = KML.Style(
                KML.IconStyle(
                    KML.scale(1.0),
                    KML.color(color),
                    KML.Icon(KML.href("images/icon-{}.png".format(i + 1)), ),
                ),
                KML.LabelStyle(KML.scale(1.0)),
                KML.BallonStyle(KML.text('FIXME')),
                id="icon-seq2-{}-{}-{}-highlight".format(i, idx, color_id))
            doc.append(style_highlight)

            style_map = KML.StyleMap(
                KML.Pair(
                    KML.key('normal'),
                    KML.styleUrl('#{}'.format(style_normal.get('id'))),
                ),
                KML.Pair(
                    KML.key('highlight'),
                    KML.styleUrl('#{}'.format(style_highlight.get('id'))),
                ),
                id="icon-seq2-{}-{}-{}".format(i, idx, color_id))
            doc.append(style_map)
            styles[idx + 1].append(style_map.get('id'))

    return doc