Question

Write a program that draws a colorful caterpillar.
Your caterpillar should:

Have 8 body circles
Have circles that alternate between 4 different colors
Hints:

Write one function to draw a body circle and fill in its color using a parameter named color_choice.
A for loop can also shorten your code!

Answer 1

You can create a colorful caterpillar using the Python `turtle` graphics library. Below is a simple program that fulfills your requirements:

### Code

```python
import turtle

# Set up the screen
screen = turtle.Screen()
screen.bgcolor("lightblue")

# Create a turtle named "caterpillar"
caterpillar = turtle.Turtle()
caterpillar.speed(2)

# Function to draw a body circle
def draw_circle(color_choice):
caterpillar.fillcolor(color_choice)
caterpillar.begin_fill()
caterpillar.circle(20) # Circle with radius 20
caterpillar.end_fill()

# List of colors to alternate
colors = ['red', 'yellow', 'green', 'blue']

# Draw the body of the caterpillar
for i in range(8):
draw_circle(colors[i % len(colors)]) # Alternate colors
caterpillar.penup()
caterpillar.forward(50) # Move forward to draw the next circle
caterpillar.pendown()

# Hide the turtle and finish
caterpillar.hideturtle()

# Finish drawing
screen.mainloop()
```

### Instructions to Run

1. Make sure you have Python installed on your computer.
2. Save the code into a file named `caterpillar.py`.
3. Run the file using Python (`python caterpillar.py`).
4. A turtle graphics window should open, displaying a colorful caterpillar made up of 8 circles.

### Explanation

- The program initializes a turtle graphics window with a light blue background.
- A `draw_circle` function is created to draw a filled circle with the specified color.
- The main loop uses a list of colors (`['red', 'yellow', 'green', 'blue']`) and alternates them for each of the 8 body circles.
- The caterpillar moves forward after drawing each circle to space them out.
- Finally, the turtle is hidden, and the program keeps the window open until closed.