from turtle import*
def trokut(a):
    for i in range(3):
        fd(a);lt(120)
def niz(a,n):
    for i in range(n):
        trokut(a)
        fd (a)
def postavi(a,n):
    bk(n*a)
    lt(60);fd(a);rt(60)
def piramida (a,n):
    if n<1:
        return
    else:
        niz(a,n)
        postavi(a,n)
        piramida(a,n-1)