Mini LOGO interpreter in Python with Turtle Graphics

minilogo.py

import turtle, time

comm = {'fd': lambda n: turtle.fd(n),
        'rt': lambda n: turtle.rt(n),
        'lt': lambda n: turtle.lt(n)}

def logo(s, p, pe):
    while p < pe:
        if s[p] == 'loop':
            n = int(s[p + 1])
            p += 3
            c, ps = 1, p
            while c != 0:
                if s[p] == '[': c += 1
                if s[p] == ']': c -= 1
                p += 1
            for _ in range(n): logo(s, ps, p - 1)
        else:
            comm[s[p]](int(s[p + 1]))
            p += 2

s = input().rstrip().split()
turtle.clear()
logo(s, 0, len(s))
time.sleep(5)