def plot_util(self):
		self.fig, self.graph = plt.subplots(figsize=self.window_shape)
		self.fig.canvas.mpl_connect('close_event', self.on_close)
		self.graph.yaxis.set_visible(False)
		self.graph.xaxis.set_visible(False)
  
		self.graph.text(0, 1.15, self.title, transform=self.graph.transAxes,
						size=24, weight=300, ha='left', va='top')

		self.bar_collections = self.graph.bar(self.x, self.arr[0], align='edge', width=0.5)

		# since the animate method in not returning any thing, thus we are using blit=False
		anim = FuncAnimation(self.fig, self.animate, frames=self.arr.shape[0], 
							interval=self.interval, blit=0, repeat=self.repeat,
							repeat_delay=1000)

		plt.box(False)
		time.sleep(1)
		plt.show()
		anim.event_source.stop()
		del anim
		plt.close()