Lecture 3 — Turtle Styling & Visibility⌗

Instructor: Laksh Budhrani

Review / Recap⌗

Basic Commands from Previous Lectures⌗

Objectives⌗

1. Learn how to change pen color using pencolor()
2. Learn how to change line thickness using pensize()
3. Learn how to hide the turtle using hideturtle()
4. Learn how to show the turtle using showturtle()

Objective 1 — pencolor()⌗

Simple Definition⌗

• pencolor() — Change the color of the turtle’s pen.

Example: Change Pen Color⌗

p.pencolor("red")
p.forward(100)

Objective 2 — pensize()⌗

Simple Definition⌗

• pensize() — Change the thickness of the line.

Example: Change Pen Size⌗

p.pensize(10)
p.forward(100)

Objective 3 — hideturtle()⌗

Simple Definition⌗

• hideturtle() — Hide the turtle icon from the screen.

Example: Hide Turtle⌗

p.hideturtle()
p.forward(100)

Objective 4 — showturtle()⌗

Simple Definition⌗

• showturtle() — Show the turtle icon again.

Example: Show Turtle⌗

p.showturtle()
p.forward(100)

CS Drawing Activity (Guided)⌗

Create a new Python file in VS Code named:
turtle_class3.py

CS Image⌗

Explain in Plain English⌗

Write a short explanation (3–5 sentences) describing how you think we can draw the letters “C” and “S” using:

• forward()
• left()
• right()
• penup()
• pendown()
• pencolor()
• pensize()
• hideturtle()

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 ---
# (Write your CS drawing steps using the new styling commands)



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

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

Notes⌗

• Use different colors for the C and S.
• Use pensize(30) to make the letters bold.
• Use penup() to move without drawing.
• Use pendown() to start drawing again.
• Use hideturtle() at the end for a clean final look.

Independent Activity — Color Stairs Drawing⌗

Stairs Image⌗

Your Task⌗

Look at the image above and draw it independently using:

• forward(distance)
• left(angle)
• right(angle)
• pencolor()
• pensize()
• 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_class3_independent.py

Inside that file, use the boilerplate and write your stairs‑drawing 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 3