ch5 ex1

from turtle import *

t=Turtle()

colors = ["violet","indigo","blue","green","yellow","orange","red"]

radius=10
y=0

while colors:
  a = colors.pop()
  t.color(a)
  t.circle(radius)
  radius += 10
  y -= 10
  t.penup()
  t.goto(0,y)
  t.pendown()
done()