import turtle
def round_rectangle(center_x, center_y, width, height, cornersize):
turtle.up()
turtle.goto(center_x - width / 2 + cornersize, center_y - height / 2)
turtle.down()
for _ in range(2):
turtle.fd(width - 2 * cornersize)
turtle.circle(cornersize, 90)
turtle.fd(height - 2 * cornersize)
turtle.circle(cornersize, 90)
round_rectangle(0, 0, 200, 100, 20)
turtle.hideturtle()
screen = turtle.Screen()
screen.mainloop()