#!/usr/bin/env python3
 
import turtle
import math
 
 
def ellipse(a, b, color='black', fill=''):
    """
    This function draws an ellipse.
    """
    dx = turtle.xcor()
    dy = turtle.ycor()
    turtle.color(color, fill)
    turtle.begin_fill()
    for deg in range(361):
        rad = math.radians(deg)
        x = a * math.sin(rad) + dx
        y = -b * math.cos(rad) + b + dy
        turtle.goto(x, y)
        if y > b:
            if deg % 10 == 0:
                turtle.penup()
            if deg % 10 == 5:
                turtle.pendown()
        else:
            turtle.pendown()
    turtle.end_fill()
 
ellipse(250, 90)