def get_x_y_lists(points:list) -> list:
    """
    Returns a list containing two lists: the x coordinates, and the y
    coordinates given a list of point tuples.
    
    >>> get_x_y_lists([(1,4),(2,3)])
    [ [1,2], [4,3] ]
    >>> get_x_y_lists([(1,1),(2,2),(3,3)])
    [ [1,1,1], [2,2,2] ]
    >>> get_x_y_lists([(0,10),(20,37),(99,120),(200,0)])
    [ [0,20,99,200], [10,37,120,0] ]
    """
    xlist = []
    ylist = []
    for (x,y) in points:
        xlist += [x]
        ylist += [y]
    return [xlist,ylist]