diff --git a/03_MonumentsSlideshow/example03_slideshow.py b/03_MonumentsSlideshow/example03_slideshow.py
index 8b9ada9f3da68c1f1bc93d51f264f55562611e94..f3072bf21cfecc87c40d7468e1c5a43f27e3c864 100644
--- a/03_MonumentsSlideshow/example03_slideshow.py
+++ b/03_MonumentsSlideshow/example03_slideshow.py
@@ -65,7 +65,7 @@ for i in range(len(file_list[:max])):
 transition = "smoothleft"
 for i in range(len(file_list[:max])-1):
 	if i == 0:
-        	create_slideshow_command += f" [a0][a1]xfade=transition={transition}:duration={duration_transition}:offset={(i+1) * (duration_image - duration_transition)}[fa{i}];"
+		create_slideshow_command += f" [a0][a1]xfade=transition={transition}:duration={duration_transition}:offset={(i+1) * (duration_image - duration_transition)}[fa{i}];"
 	elif i == len(file_list[:max])-2:
 		create_slideshow_command += f" [fa{i-1}][a{i+1}]xfade=transition={transition}:duration={duration_transition}:offset={(i+1) * (duration_image - duration_transition)}[fa{i}]\""
 	else: