def get_path(source,destination):
    """
    Obtain and return a list of the coordinates of all tiles between two points.
    """
    values = []
    (x0,y0) = source
    (x1,y1) = destination
    dx = x1 - x0
    dy = y1 - y0
    gradiant = float(dy)/dx
    error = 0
    y = y0
    for x in xrange(x0,x1+1):
        values.append((x,y))
        error += gradiant
        while error > 1 or error < 1:
            y +=1
            error -=1
            values.append((x,y))
        if error >= 0.5 or error <= -0.5:
            y +=1
            error -=1
    return values