Lecture 7 — Turtle Shapes, Stamps & Sizes⌗

Instructor: Laksh Budhrani

Review / Recap⌗

Commands You Already Know⌗

Objectives⌗

1. Learn how to change turtle shape
2. Learn how to stamp turtle shapes
3. Learn how to change turtle size using turtlesize()
4. Learn how to change turtle speed
5. Learn how to draw dots using dot()

Objective 1 — shape()⌗

Simple Definition⌗

• shape() — Change the turtle’s appearance.

Available Shapes⌗

• "arrow"
• "turtle"
• "circle"
• "square"
• "triangle"
• "classic"

Example⌗

p.shape("turtle")
p.forward(100)

Objective 2 — stamp()⌗

Simple Definition⌗

• stamp() — Leave a copy of the turtle shape on the screen.

Example⌗

p.shape("arrow")
p.stamp()
p.forward(30)
p.shape("turtle")
p.stamp()
p.forward(30)
p.shape("circle")
p.stamp()

Objective 3 — turtlesize()⌗

Simple Definition⌗

• turtlesize() — Make the turtle icon bigger or smaller.

Example⌗

p.shape("circle")
p.turtlesize(1)
p.stamp()
p.forward(70)
p.turtlesize(2)
p.stamp()
p.forward(70)
p.turtlesize(3)
p.stamp()

Objective 4 — speed()⌗

Simple Definition⌗

• speed() — Change how fast the turtle moves.

Speed Levels (Short & Simple)⌗

• speed(0) → fastest (no animation)
• speed(1) → slowest
• speed(3) → slow
• speed(6) → normal
• speed(10) → fast

Example⌗

p.speed(0)   # fastest drawing

Objective 5 — dot()⌗

Simple Definition⌗

• dot(size, color) — Draw a filled circle (dot).

Example⌗

p.dot(30, "red")
p.forward(40)
p.dot(15, "purple")
p.forward(40)
p.dot(25, "green")

Solar System Activity (Guided)⌗

Create a new Python file in VS Code named:
turtle_class7.py

Solar System Image⌗

Explain in Plain English⌗

Write a short explanation (3–5 sentences) describing how you think we can draw this solar system using:

• shape()
• turtlesize()
• stamp()
• speed()
• dot()
• pencolor()
• fillcolor()
• goto()
• penup()
• pendown()

Explain the steps in simple English, as if you are telling a friend how to draw it.

Boilerplate Code⌗

import turtle as trtl

p = trtl.Turtle()
p.speed(0)

# --- ENTER YOUR CODE HERE ---
# (Use shape, turtlesize, stamp, speed, and dot to draw the solar system)



# --------------------------------------------------------------
# (Stop writing code above this line)

wn = trtl.Screen()
wn.mainloop()

Notes⌗

• Use shape("triangle") and stamp() for stars
• Use dot() for planets
• Use turtlesize() to make stars bigger
• Use goto() to place each planet
• Use bgcolor() to make space look nice
• Use hideturtle() at the end for a clean final look

Independent Activity — Ladybug Drawing⌗

Ladybug Image⌗

Your Task⌗

Look at the image above and draw it independently using:

• shape()
• turtlesize()
• stamp()
• dot()
• fillcolor()
• pencolor()
• goto(x, y)
• penup()
• pendown()
• hideturtle()

Use the Turtle boilerplate code provided earlier in this lecture.

Create Your Own File⌗

Create a new Python file in VS Code named:

turtle_class7_independent.py

Inside that file, use the boilerplate and write your ladybug code in the section marked:

# --- ENTER YOUR CODE HERE ---

Submission Instructions⌗

Submit your work in Google Classroom by:

1. Creating a Google Doc
2. Pasting your code into the document
3. Adding a screenshot of the output window showing your drawing
4. Turn in the Google Doc to the assignment titled In‑Class Exercise 7