r = Rectangle()
r.width = 50
r.height = 50
r.rotation = 0
r.color = 'black'

with animation():
    r.rotation = 360
    r.color = 'white'
    r.width = 0
    r.height = 0

with animation():
    r.rotation = -360
    r.color = 'black'
    r.width = 50
    r.height = 50