Use pyplot's pause due to its event loop

fosdem_video_progress.py

@@ -6,7 +6,6 @@ import json
 from datetime import datetime
 from dataclasses import dataclass
 from collections import defaultdict
-from time import sleep
 from pathlib import Path
 
 api_url = r'https://review.video.fosdem.org/api/v1/event/1/overview'
@@ -63,7 +62,7 @@ def main():
 		plt.stackplot(x, *ys)
 		plt.show(block=False)
 
-		sleep(poll_rate)
+		plt.pause(poll_rate)
 		plt.close()
 		plt.clf()