def convert_array_list_to_x_y_lists(array_list):
    """
    Returns two lists (first, x values, second, y values of array in
    array_list.

    Parameters
    ----------
    array_list : list (of arrays)
        List with numpy.arrays (with x, y coordinates)

    Returns
    -------
    list_x : list (of floats)
        List with x coordinates
    list_y : list (of floats)
        List with y coordinates
    """
    list_x = []
    list_y = []
    for i in range(len(array_list)):
        list_x.append(array_list[i][0])
        list_y.append(array_list[i][1])
    return list_x, list_y