我蹦迪，我快乐！

# SpiralRosettes.py - challenge problem
import turtle
t=turtle.Pen()
t.penup()
t.speed(0)
turtle.bgcolor('black')
# Ask the user for the number of sides, default to 4, min 2, max 6
sides = int(turtle.numinput("Number of sides",
            "How many sides in your spiral of rosettes?", 4,2,6))
colors=['red', 'yellow', 'blue', 'green', 'purple', 'orange']
# Our outer spiral loop
for m in range(100):
    t.forward(m*4)
    position = t.position() # remember this corner of the spiral
    heading = t.heading()   # remember the direction we were heading
    # Our 'inner' spiral loop draws a rosette
    for n in range(sides):
        t.pendown()
        t.pencolor(colors[n%sides])
        t.circle(m/5)
        t.right(360/sides - 2)
        t.width(m/20)
        t.penup()
    t.setx(position[0])     # go back to the big spiral's x location
    t.sety(position[1])     # go back to the big spiral's y location
    t.setheading(heading)   # point in the big spirals direction/heading
    t.left(360/sides + 2)   # move to the next point on the big spiral