code: def pause(self, pause=0):
          
          fr = self.frames[-1]
          n = int(self.fps * pause)
          for i in range(n):
              fr2 = "/tmp/vpvid/" + str(len(self.frames)) + ".png"
              self.frames.append(fr2)
              os.system("cp -f %s %s" % (fr, fr2))
docs: Insert a `pause`, in seconds.