# Blue sky background

Rectangle(color=['#144290','#75b5f7'])

# loop over a list of numbers from 0 to 6
# In every loop, create a new rectangle
# Rectangle size will get smaller every time, hence the "15 minus the loop number" part
# Height will always be the same.
# Y position will be less every time, hence the "95 minus the loop number" part

loopList = range(0, 7)
for loopNumber in loopList:
    with animation(duration=1):
        Rectangle(color='lightgray',
                  width=(15-loopNumber*2),
                  height=10,
                  y=(95-loopNumber*10))