import turtle

def main():
    # Set up the screen
    screen = turtle.Screen()
    screen.setup(width=600, height=400) 
    
    # Create a turtle object
    pen = turtle.Turtle()
    pen.width(2) # Set line width
    pen.penup() # Lift the pen to move without drawing

    # --- Draw a pentagon in the left half ---
    pen.goto(-200, 70) # Move to the left side of the screen
    pen.pendown() # Put the pen down to start drawing
    pen.color("blue")

    #   A for loop is better here, but we may not yet cover looping.
    pen.forward(80) # draw the first line of the pentagon
    pen.right(72)   # the exterior angle of a pentagon
    pen.forward(80)
    pen.right(72)   
    pen.forward(80)
    pen.right(72)   
    pen.forward(80)
    pen.right(72)   
    pen.forward(80)
    pen.right(72)   
    
    # --- Draw concentric circles in the right half ---
    
    #  circle 1
    pen.penup() # Put the pen up to not draw
    pen.goto(150, -100) # Move to the right side of the screen
    pen.pendown() # Put the pen down to start drawing 
    pen.color("red")
    pen.begin_fill()
    pen.circle(100)
    pen.end_fill()

    #  circle 2    
    pen.penup() 
    pen.goto(150, -80) 
    pen.pendown()
    pen.color("yellow")
    pen.begin_fill()
    pen.circle(80)
    pen.end_fill()

    #  circle 3
    pen.penup() 
    pen.goto(150, -60) 
    pen.pendown()
    pen.color("green")
    pen.begin_fill()
    pen.circle(60)
    pen.end_fill()

    #  circle 4
    pen.penup() 
    pen.goto(150, -40) 
    pen.pendown()          
    pen.color("blue")
    pen.begin_fill()
    pen.circle(40)
    pen.end_fill()
    
    screen.exitonclick()
    
if __name__ == "__main__":
    main()