import turtle

ad=turtle.Turtle()
ad.shape("turtle")
ad.pensize(10)
ad.speed(0)
bax=["blue","green","red","yellow"]
for i in bax:
    ad.color(i)
    ad.forward(50)
    ad.left(90)
ad.up()
ad.goto(-25,-25)
ad.down()
for i in bax:
    ad.color(i)
    ad.forward(100)
    ad.left(90)
ad.up()
ad.goto(-45,-45)
ad.down()
for i in bax:
    ad.color(i)
    ad.forward(150)
    ad.left(90)
ad.up()
ad.goto(-60,-60)
ad.down()
for i in bax:
    ad.color(i)
    ad.forward(200)
    ad.left(90)
ad.up()
ad.goto(-90,-90)
ad.down()
for i in bax:
    ad.color(i)
    ad.forward(250)
    ad.left(90)
ad.up()
ad.goto(-105,-105)
ad.down()
for i in bax:
    ad.color(i)
    ad.forward(300)
    ad.left(90)
ad.up()
ad.goto(-120,-120)
ad.down()
for i in bax:
    ad.color(i)
    ad.forward(350)
    ad.left(90)
ad.up()
ad.goto(-140,-140)
ad.down()

for i in bax:
    ad.color(i)
    ad.forward(400)
    ad.left(90)
ad.up()
ad.goto(-160,-160)
ad.down()
for i in bax:
    ad.color(i)
    ad.forward(450)
    ad.left(90)
ad.up()
ad.goto(-190,-190)
ad.down()

for i in bax:
    ad.color(i)
    ad.forward(500)
    ad.left(90)
ad.up()
ad.goto(-210,-210)
ad.down()

for i in bax:
    ad.color(i)
    ad.forward(550)
    ad.left(90)
ad.up()
ad.goto(-230,-230)
ad.down()
for i in bax:
    ad.color(i)
    ad.forward(600)
    ad.left(90)
ad.up()
ad.goto(-250,-250)
ad.down()
for i in bax:
    ad.color(i)
    ad.forward(650)
    ad.left(90)
ad.up()
ad.goto(-280,-280)
ad.down()
for i in bax:
    ad.color(i)
    ad.forward(700)
    ad.left(90)
ad.up()
ad.goto(-300,-300)
ad.down()
for i in bax:
    ad.color(i)
    ad.forward(750)
    ad.left(90)
ad.up()
ad.goto(-320,-320)
ad.down()
ad.color("black")
ad.write("amin rezaee")
ad.up()
ad.goto(25,25)

for i in range(10):
    ad.color("yellow")
    ad.color("blue")
    ad.color("black")
    ad.color("green")
    ad.color("red")