def vscroll(clicks, x=None, y=None, pause=None, _pause=True):
    """Performs an explicitly vertical scroll of the mouse scroll wheel,
    if this is supported by the operating system. (Currently just Linux.)

    The x and y parameters detail where the mouse event happens. If None, the
    current mouse position is used. If a float value, it is rounded down. If
    outside the boundaries of the screen, the event happens at edge of the
    screen.

    Args:
      clicks (int, float): The amount of scrolling to perform.
      x (int, float, None, tuple, optional): The x position on the screen where the
        click happens. None by default. If tuple, this is used for x and y.
      y (int, float, None, optional): The y position on the screen where the
        click happens. None by default.

    Returns:
      None
    """
    _failSafeCheck()
    if type(x) in (tuple, list):
        x, y = x[0], x[1]
    x, y = position(x, y)
    platformModule._vscroll(clicks, x, y)

    _autoPause(pause, _pause)