T1=[10*t/50 for t in range(51)]
T2=T1[::-1]
T3=[-t for t in T1]
T4=T3[::-1]
Background=circle((0,0),5,linestyle=':',xmin=-10,xmax=10,ymin=-10,ymax=10,aspect_ratio=1)
Films1=[Background+line([(i,0),(0,(10^2-i^2)^(1/2))],thickness=3)+point(((i,0),(0,(10^2-i^2)^(1/2)),(i/2,((10^2-i^2)^(1/2)/2))),rgbcolor='red',size=50) for i in T1]
Films2=[Background+line([(i,0),(0,-(10^2-i^2)^(1/2))],thickness=3)+point(((i,0),(0,-(10^2-i^2)^(1/2)),(i/2,-((10^2-i^2)^(1/2)/2))),rgbcolor='red',size=50) for i in T2]
Films3=[Background+line([(i,0),(0,-(10^2-i^2)^(1/2))],thickness=3)+point(((i,0),(0,-(10^2-i^2)^(1/2)),(i/2,-((10^2-i^2)^(1/2)/2))),rgbcolor='red',size=50) for i in T3]
Films4=[Background+line([(i,0),(0,(10^2-i^2)^(1/2))],thickness=3)+point(((i,0),(0,(10^2-i^2)^(1/2)),(i/2,((10^2-i^2)^(1/2)/2))),rgbcolor='red',size=50) for i in T4]
Films=Films1+Films2+Films3+Films4
a=animate(Films)
