by Lei Wang
import turtle
wn = turtle.Screen()
background_color = raw_input("What color should the background be?") #Ask user background color
wn.bgcolor(background_color)
tess = turtle.Turtle()
tess_color = raw_input("What color should the tess be?")
tess.color(tess_color) #Ask user background color
tess.shape("arrow") # Set turtle shape to shape with given name
tess.down() # this is new
for size in range(10,60,1): # start with size = 5 and grow by 2
tess.stamp() # leave an impression on the canvas
tess.forward(size) # move tess along
tess.right(24) # and turn her
print("What does the picture look like?")
wn.exitonclick()
