import time
import threading
import sys


class ProgressBar():

    def __init__(self):
        self.start = time.time()
        self.count = 0
        self.completed = False
        self.width = 4n

    def stop(self):
        self.completed = True

    def print(self, msg):
        while not self.completed:
            elapsed = time.time() - self.start
            if elapsed > 0.3:
                self.start = time.time()
                self.count += 1
                suffix = '.' * (self.count % self.width)
                suffix = suffix.ljust(self.width - self.count % self.width, ' ')
                print("{}{}".format(msg, suffix), end='\r', flush=True)


if __name__ == '__main__':
    pb = ProgressBar()
    t = threading.Thread(target=pb.print, args=("Doing stuff",))
    t.start()
    time.sleep(5)
    pb.stop()
    t.join()