3.5.4 Bubble Wrap 2.0

"""
This code will fill the canvas with light blue circles and highlights.

"""
speed(0)

# This function will draw one row of 10 circles
def draw_circle_row():
    for i in range(10):
        pendown()
        begin_fill()
        color("light blue")
        circle(20)
        end_fill()
        make_highlight()
        penup()
        forward(40)

# This function will move Tracy up one row.       
def move_up_a_row():
    left(90)
    forward(40)
    right(90)
    backward(400)

# This function will highlight one row of 10 circles   
def make_highlight():
    penup()
    left(90)
    forward(10)
    right(90)
    color("white")
    circle(10, 90)
    pendown()
    circle(10,90)
    penup()
    right(90)
    forward(10)
    left(90)
    circle(20,180)

        

#Start position 
penup()
setposition(-180,-200)

# Repeat fill circle functions 10 times.
for i in range(10):
    draw_circle_row()
    move_up_a_row()

# Reset to starting position. 
penup()
setposition(-180,-200)
left(90)

#Highlight the circles.
for i in range(10):
    make_highlight()
    move_up_a_row()