turtle basic

import turtle
t=turtle.Pen()
t.clear()
t.penup()
t.color("red")
t.pensize(5)
t.setpos(-200,-200)
t.pendown()
for i in range(4):
    t.forward(200)
    t.left(90)
t.mainloop()

進化版

import turtle
p=turtle.Pen()
p.penup()
p.pensize(5)
p.color("red")
p.setpos(-100,-100)
p.clear()
p.pendown()
sides=5
ang=360/sides
for i in range(1,sides+1):
    p.forward(200)
    p.left(ang)