Flower

Flower

Now we will create a new function that will draw a triangle for each side. It will do this by going forward and right three times at an angle of 120 degrees. We will put that triangle into a function called petal. We will then call that function four times. At the end we will draw the stem. To make the stem wider we will change the pen size.

Sample Code

import turtle
dan = turtle.Turtle()
dan.shape('turtle')

distance = 100
angle = 120

def petal():
   if i % 2:
      dan.color('green')
   else:
      dan.color('lightgreen')
   dan.left(30)
   # draw a triangle and fill in the color
   dan.begin_fill()
   dan.forward(distance)
   dan.right(angle)
   dan.forward(distance)
   dan.right(angle)
   dan.forward(distance)
   dan.end_fill()
   dan.left(angle)

# start off 45 right
dan.right(45)
# repeat the forward/right functions four times
for i in range(4):
   petal()
# now draw the stem
dan.pensize(10)
dan.right(45)
dan.forward(200)

dan.write('done with flower')

Drawing

Run the Example on Trinket

Run the Flower Example on Trinket

Experiments

1. Can you change the colors of the petals?
2. Can you change the width of the stem of the flower using the pensize() function?
3. Can you change the size of the petals?
4. Can you change the number of petals? Why is this problem harder? What assumptions did the original author of the program make?