I am running a script that runs once and stops. How do I loop it infinitely?

import time
outpins =  [ 4,  5,  6, 12, 13, 17 ]
inpins =  [ 18, 22, 23, 24, 25, 26 ]
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)
nlines = 6

time.sleep(1.0)
for i in range(0,nlines):
    GPIO.setup(inpins[i], GPIO.IN, pull_up_down = GPIO.PUD_DOWN)

for i in range(0,nlines):
    GPIO.setup(outpins[i], GPIO.IN, pull_up_down = GPIO.PUD_DOWN)
bad = 0
for i in range(0,nlines):
    GPIO.setup(outpins[i],GPIO.OUT)
    GPIO.output(outpins[i], GPIO.HIGH)
    if(GPIO.input(inpins[i])==0):
        bad = 1
        cross = 0
        for j in range(0,nlines): # if it looks open cehck for cross links
            if(j!=i):
                if(GPIO.input(inpins[j])==1):
                    print "cross linked %d to %d" % (i, j)
                    cross = 1
        if(cross==0): # if not cros linked then its just open
            print "line %d open" % i
    for j in range(i+1,nlines):
        if(GPIO.input(inpins[j])==1):
            print "short %d to %d" % (i, j)
            bad = 1
    GPIO.output(outpins[i], GPIO.LOW)
    GPIO.setup(outpins[i], GPIO.IN, pull_up_down = GPIO.PUD_DOWN)
if(bad==1):
    print "cable is BAD"
if(bad==0):
    print "cable is GOOD"