added app3.py and coba.py

coba.py

@@ -0,0 +1,19 @@
+import cv2
+
+# Initialize the webcam
+video_capture = cv2.VideoCapture(-1)
+
+while True:
+    # Capture a single frame from the webcam
+    ret, frame = video_capture.read()
+
+    # Display the resulting image
+    cv2.imshow('Video', frame)
+
+    # Exit the loop if the 'q' key is pressed
+    if cv2.waitKey(1) & 0xFF == ord('q'):
+        break
+
+# Release the webcam and close all windows
+video_capture.release()
+cv2.destroyAllWindows()