unitcircle = ellipse((0,0),1.,1.)
firstpoint = point((cos(2*pi/10), sin(2*pi/10)), color='red',size=80)
fil=line([(0,0),(cos(2*pi/10),sin(2*pi/10))])
movingpoints= [point((cos(2*k*pi/10), sin(2*k*pi/10)), \
   color='red', size=80)+line([(0,0),(cos(2*k*pi/10),sin(2*k*pi/10))]) for k in range(7,9)]
a = animate(movingpoints,xmin=-1,xmax=1,ymin=-1,ymax=0)
a.show()