Python Lines Demo

# Lines Demo
# By @TokyoEdTech

import turtle
import random
import time

wn = turtle.Screen()
wn.title("Lines Demo")
wn.bgcolor("black")
wn.setup (width=400, height=400)
wn.tracer(0)

pen = turtle.Turtle()
pen.speed(0)
pen.hideturtle()
pen.color("yellow")
pen.width(3)

colors = ["red", "orange", "green", "blue", "purple"]

def draw_line(pen, x1, y1, x2, y2):
    pen.penup()
    pen.goto(x1, y1)
    pen.pendown()
    pen.goto(x2, y2)
    pen.color(random.choice(colors))

while True:
    for x1 in range(-200, 200, 4):
        for y1 in range(-200, 200, 4):
            draw_line(pen, x1, y1, 0, 0)
            wn.update()
            if y1 % 20 == 0:
                pen.clear()

    for x1 in range(200, -200, -4):
        for y1 in range(200, -200, -4):
            draw_line(pen, x1, y1, 0, 0)
            wn.update()
            if y1 % 20 == 0:
                pen.clear()



wn.mainloop()