week08.py

# Week 8: Pattern Maker (Loops + Turtle)
# Goal: Use nested loops to create patterns and understand angle mathematics
# New concept: WHILE LOOPS as alternative to for loops

import turtle

# Setup screen
screen = turtle.Screen()
screen.title("Pattern Maker")

# Create turtle
t = turtle.Turtle()
t.speed(0)  # 0 = fastest (instant drawing, no animation)

# ===== PART 1: Draw a regular polygon (configurable) =====
# Try changing these values to see different shapes!
sides = 6                # Number of sides (3=triangle, 4=square, 6=hexagon, etc.)
step = 80               # Length of each side
turn = 360 / sides      # Calculate angle: 360 degrees / number of sides

# Draw the polygon
for _ in range(sides):
    t.forward(step)
    t.right(turn)

# ===== PART 2: Create a circular pattern of squares =====
# This demonstrates NESTED LOOPS (loop inside a loop)

# Reset turtle to center
t.penup()
t.goto(0, 0)
t.pendown()

# Outer loop: How many times to repeat the pattern
for _ in range(18):
    
    # Inner loop: Draw one square
    for _ in range(4):
        t.forward(60)
        t.right(90)
    
    # Rotate before drawing next square
    t.right(20)  # 18 squares × 20 degrees = 360 degrees (full circle)

# ===== EXAMPLE: While loop alternative =====
# Uncomment this section to try while loops instead!
# This creates the same pattern as above, but uses while instead of for

# t.clear()  # Clear screen first
# t.penup(); t.goto(0, 0); t.pendown()
# 
# rotation = 0
# while rotation < 360:  # Keep going WHILE less than 360 degrees
#     # Draw one square
#     for _ in range(4):
#         t.forward(60)
#         t.right(90)
#     
#     # Rotate and update counter
#     t.right(20)
#     rotation = rotation + 20  # IMPORTANT: Must update or loop runs forever!
# 
# print(f"Drew {rotation // 20} squares")  # How many did we draw?

# Hide turtle and finish
t.hideturtle()
screen.mainloop()