import turtle

zolwik=turtle.Turtle()
zolwik.shape("turtle")
zolwik.pencolor('red')
zolwik.pensize(10)
turtle.bgcolor("black")
zolwik.turtlesize(stretch_wid=3)
zolwik.turtlesize(stretch_len=4)
zolwik.fillcolor("yellow")
zolwik.write("sigma",font=("Calibri",30,"bold","italic","underline"))

zolwik.begin_fill()

zolwik.forward(100)
zolwik.speed(2)
zolwik.left(90)
zolwik.forward(200)
zolwik.left(90)
zolwik.forward(200)
zolwik.left(90)
zolwik.forward(200)
zolwik.left(90)
zolwik.forward(200)

zolwik.end_fill()



turtle.exitonclick()