Turtle - Example

import turtle

t1 = turtle.Turtle()
t2 = turtle.Turtle()
t1.shape('turtle')
t2.hideturtle()
t2.pencolor('white')
t2_move =[]
while True:
    direction = input('방향입력(l:left, r:right, q:종료) : ')
    if direction == 'l':
        t1.left(90)
        t1.forward(100)
        t2_move.append('l')
    if direction == 'r':
        t1.right(90)
        t1.forward(100)
        t2_move.append('r')
    if direction == 'q':
        break
    if len(t2_move)==4 and t2_move[0]=='l':
        t2.left(90)
        t2.forward(100)
        del t2_move[0]
    if len(t2_move)==4 and t2_move[0]=='r':
        t2.right(90)
        t2.forward(100)
        del t2_move[0]

print("종료")
turtle.mainloop()