net.py

from turtle import Turtle

NET_COLOR = "white"

def make_net():

    net = Turtle()
    net.hideturtle()
    net.penup()
    net.color(NET_COLOR)
    net.goto(0, -280)
    net.setheading(90)


    keep_drawing = True
    while keep_drawing:
        if net.ycor() > 300:
            keep_drawing = False
        else:
            net.pendown()
            net.forward(30)
            net.penup()
            net.forward(30)