a little triangle in a big triangle

import turtle

turtle.color('black','blue')
turtle.pensize(3)
turtle.begin_fill()
turtle.penup()
turtle.goto(-100,80)
turtle.pendown()
for i in range(3):
    turtle.fd(150) 
    turtle.rt(120)
turtle.lt(60)
turtle.fd(150)
for i in range(3):
    turtle.rt(120)
    turtle.fd(300) 
  
turtle.end_fill()