Here is the exact solution in Python using the turtle graphics library:

import turtle

# Constants
NUM_CIRCLES = 15 # You can change this value to any number of circles
RADIUS = 20 # Radius of each circle
SPACING = RADIUS * 2 # Distance between centers of circles

# Set up the screen
screen = turtle.Screen()
screen.setup(width=800, height=200) # Adjust the screen size as needed

# Set up the turtle
worm = turtle.Turtle()
worm.shape(“circle”)
worm.penup()
worm.color(“black”)

# Calculate the starting x-position to center the worm horizontally
start_x = -((NUM_CIRCLES – 1) * SPACING) / 2

# Draw the worm
for i in range(NUM_CIRCLES):
worm.goto(start_x + i * SPACING, 0) # Centered vertically at y = 0
worm.stamp() # Stamp a circle shape at the current position

# Finish drawing
turtle.done()

Explanation of the Solution:

1. Constants:
   • NUM_CIRCLES: This determines the number of circles in the worm.
   • RADIUS: Sets the radius of each circle, which helps calculate the spacing.
   • SPACING: The distance between the centers of each circle, calculated as RADIUS * 2.
2. Screen Setup:
   • The screen size is set to be wide enough to accommodate the worm horizontally.
3. Turtle Setup:
   • A turtle object worm is created with a circular shape and no drawing line (penup()). It is colored black to resemble the worm’s segments.
4. Centering Calculation:
   • start_x is calculated to position the first circle such that the worm is centered horizontally across the screen.
5. Loop to Draw the Worm:
   • The for loop iterates NUM_CIRCLES times, placing each circle at an even horizontal distance (SPACING) from the previous one. Each circle is stamped at the calculated position.