https://stackoverflow.com/questions/25088087/how-to-move-a-turtle-stamp-in-python

import random
import turtle

STAMP_SIZE = 20
SQUARE_SIZE = 15
FINISH_LINE = 200
COLOR_LIST = ['red', 'blue', 'green', 'brown', 'yellow', 'purple']

def draw_start():
    turtle.speed('fastest')
    turtle.penup()
    turtle.setpos(-350, 300)
    turtle.pendown()
    turtle.right(90)
    turtle.forward(520)

def draw_finish():
    turtle.shape('square')
    turtle.shapesize(SQUARE_SIZE / STAMP_SIZE)
    turtle.penup()

    for i in range(18):
        turtle.setpos(FINISH_LINE, (300 - (i * SQUARE_SIZE * 2)))
        turtle.stamp()

    for j in range(18):
        turtle.setpos(FINISH_LINE + SQUARE_SIZE, ((300 - SQUARE_SIZE) - (j * SQUARE_SIZE  * 2)))
        turtle.stamp()

    turtle.hideturtle()

def move_turtle(who):
    who.forward(random.randint(1, 10))
    if who.xcor() < FINISH_LINE:
        turtle.ontimer(lambda who=who: move_turtle(who), 50)

print('Welcome to Turtle Racing!')
number_of_turtles = int(input('How many turtles (between 3 and 6): '))

draw_start()
draw_finish()

turtle_list = []

for idx in range(number_of_turtles):
    racer = turtle.Turtle('turtle', visible=False)
    racer.speed('fastest')  # affects drawing speed, not forward motion
    racer.penup()
    racer.setpos(-350 - STAMP_SIZE, 280 - idx * 90)
    racer.color(COLOR_LIST[idx])
    racer.showturtle()

    turtle_list.append(racer)

for racer in turtle_list:
    turtle.ontimer(lambda who=racer: move_turtle(who), 100)

turtle.exitonclick()