turtle import Turtle, Screen

def draw_square(some_turtle):

    for _ in range(4):
        some_turtle.forward(200)
        some_turtle.right(90)

def draw_art():

    # Turtle Brad
    brad = Turtle(shape="turtle")
    brad.color("yellow")
    brad.pensize(2)
    brad.speed("normal")  # 6/normal is the default so don't need to do it

    for _ in range(36):
        draw_square(brad)
        brad.right(10)

    # Turtle Angie
    angie = Turtle(shape="turtle")
    angie.color("blue")
    angie.pensize(2)
    angie.speed(5)  # slightly slower than brad

    size = 1

    for _ in range(300):
        angie.forward(size)
        angie.right(91)
        size += 1

window = Screen()
window.bgcolor("black")

draw_art()

window.exitonclick()

   import turtle as tu
   import random # import random module

my_turtle = tu.Turtle()
my_turtle.screen.bgcolor('red')
my_turtle.left(90)
my_turtle.speed(20)
my_turtle.color('green')
my_turtle.pensize(5)
my_turtle.screen.title("My Fractal Tree")
 
def draw_fractal(blen):
     
    # add these two lines
    sfcolor = ["white", "blue", "purple", "grey", "magenta"]
    my_turtle.color(random.choice(sfcolor))
 
    if(blen<10):
        return
    else:
 
        my_turtle.forward(blen)
        my_turtle.left(30)
        draw_fractal(3*blen/4)
        my_turtle.right(60)
        draw_fractal(3*blen/4)
        my_turtle.left(30)
        my_turtle.backward(blen)
 
draw_fractal(80)
my_turtle = tu.done()