Iterating through a python sqlite db using data as a timer variable -

i have sqlite database 4 columns: cycle_no, step, color, duration. run color each step in cycle duration indicated. example, if database contains this: torun = [(1,1,red,2),(1,2,blue,4), (1,3,green,3) red light 2 minutes, blue 4 minutes , green 3 minutes. using wx.timer , process starts on button click.

def onrun(self, event):      torun = self.c.execute("select * cycles cycle_no=1").fetchall()     print torun      row in torun:         #something here       self.settime()     self.lighttimer.start(10000)  def settime(self):     global timeon     = datetime.datetime.now()     timeon = + datetime.timedelta(minutes=dur)      print timeon  def checkruntime(self,event):     global timeon,     if timeon < datetime.datetime.now():         print 'check time' 

i'm not having luck loop. either colors go off @ once or last color lights. thank you.