I stole the idea from the interactive version of our book: https://sphotos-b-lga.xx.fbcdn.net/hphotos-prn1/75915101518288302697882026467913_n.jpg
Which was actually extremely helpful, so you guys should definitely check it out! I may not have the math totally down, but I feel like I understand how for loops work.
import turtle
wn = turtle.Screen()
wn.bgcolor("orange")
andy = turtle.Turtle()
andy.color("pink")
andy.shape("triangle")
print(range(5, 60, 2))
andy.up()
for size in range (5, 60, 2):
andy.stamp()
andy.forward(size)
andy.right(24)
>> wn.exitonclick()