= Asking for Help: What is wrong with this "game of life" program? =

I have a problem with a program for Conway's Game of Life.  Here's the source code:

{{{#!python
#! /usr/bin/env python
# Conway's game of life on a finite rectangular universe
# The boundary is considered to be perpetually dead.

def disp(state):
    h, v, zz = len(state[0])-2, len(state)-2, "+"
    for t in range(h):
        zz += "--"
    print zz + "+"
    for t in range(v):
        z = "|"
        for u in range(h):
            z += ["  ", "88"][state[t+1][u+1]]
        print z + "|"
    print zz + "+"
    for t in range(3):
        print

def iterate(state):
    h, v, new = len(state[0])-2, len(state)-2, state
    r = [[0,0,0,1,0,0,0,0,0],[0,0,1,1,0,0,0,0,0]]
    for t in range(v):
        for u in range(h):
            aa = state[t][u]
            ab = state[t][u+1]
            ac = state[t][u+2]
            ba = state[t+1][u]
            bb = state[t+1][u+1]
            bc = state[t+1][u+2]
            ca = state[t+2][u]
            cb = state[t+2][u+1]
            cc = state[t+2][u+2]
            s = aa+ab+ac+ba+bc+ca+cb+cc
            new[t+1][u+1] = r[bb][s]
    return new

state, s, iters = [], [], 0
for t in range(20):
    state.append([])
    for u in range(20):
        state[t].append(0)

state[3][3] = 1
state[4][4] = 1
state[5][4] = 1
state[5][3] = 1
state[5][2] = 1

while True:
    print iters
    disp(state)
    for t in range(1000000):
        pass
    state = iterate(state)
    iters += 1
}}}

The program doesn't quite do what it should, but I can't find anything wrong with the source.

{{{#!wiki note
When ''answering'' questions, add the CategoryAskingForHelpAnswered category when saving the page. This will move the link to this page from the questions section to the answers section on the [[Asking for Help]] page.
}}}

----
CategoryAskingForHelp