code: def delay(self, secs):
          
          secs = int(secs)
          for i in reversed(range(secs)):
              sys.stdout.write('\r')
              sys.stdout.write("sleep %ds, left %2ds" % (secs, i+1))
              sys.stdout.flush()
              time.sleep(1)
          sys.stdout.write("\n")
          return self
docs: Delay some seconds
          Args:
              secs: float seconds
  
          Returns:
              self