Scheduler to run certain tasks during certain times not working correctly

Scheduler to run certain tasks during certain times not working correctly

I'm trying to make a scheduler to run scripts at certain times.
The code below is my own version, but there is a problem with when the
time gets to 23:59:59 and goes across to 00:00:01 it for some reason
doesn't continue idling... instead it calls the callscripts() once and
then it will go back to idling...
from datetime import date, timedelta
from sched import scheduler
from time import time, sleep, strftime
import random
s = scheduler(time, sleep)
random.seed()
def periodically(runtime, intsmall, intlarge, function):
## Get current time
currenttime = strftime('%H:%M:%S')
## If currenttime is anywhere between 23:40 and 23:50 then...
if currenttime > '23:40:00' and currenttime < '23:50:00':
## Call clear
clear()
## Update time
currenttime = strftime('%H:%M:%S')
## Idle time
while currenttime > '23:40:00' and currenttime < '23:59:59' or
currenttime > '00:00:00' and currenttime < '01:30:00':
## Update time
currenttime = strftime('%H:%M:%S')
runtime += random.randrange(intsmall, intlarge)
s.enter(runtime, 1, function, ())
s.run()
def callscripts():
print "Calling Functions"
main1()
main2()
def main1():
print "Main1"
def main2():
print "Main2"
def clear():
print "Clearing"
while True:
periodically(2, -1, +1, callscripts)
Anyone know how this can be fixed or know a better way to do this?
Many thanks AEA