code: def update(self, deltat=1.0):
          '''straight lines, with short life'''
          DNFZ.update(self, deltat)
          self.lifetime -= deltat
          if self.lifetime <= 0:
              self.randpos()
              self.lifetime = random.uniform(300,600f update(self, deltat=1.0):
          '''straight lines, with short life'''
          DNFZ.update(self, deltat)
          self.lifetime -= deltat
          if self.lifetime <= 0:
              self.randpos()
              self.lifetime = random.uniform(300,600)
docs: straight lines, with short life