Added threading example.

test24.py

@@ -0,0 +1,19 @@
+from threading import Thread
+from time import sleep
+import tkinter as tk
+
+def hello():
+    i = 1
+    while i < 10:
+        print(f"Hello {i}")
+        i += 1
+        sleep(1)
+
+t1 = Thread(target = hello)
+t2 = Thread(target = hello)
+
+#t1.start()
+#t2.start()
+
+tk.Tk()
+sleep(10)