diff --git a/week-3/Nazrulhasan_Alam/wallpaperChanger.py b/week-3/Nazrulhasan_Alam/wallpaperChanger.py
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+++ b/week-3/Nazrulhasan_Alam/wallpaperChanger.py
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+import os
+import ctypes
+from datetime import datetime
+import random
+
+#Adding all the wallpaper images from the directory in a list
+def get_images():
+    pref_extensions = ['jpg', 'png',  'jpeg']
+    with os.scandir("./wallpapers") as files:
+        images = []
+        for image in files:
+            if image.is_file and image.name.split('.')[1] in pref_extensions:
+                images.append(os.path.join(os.getcwd(),'wallpapers\\'+str(image.name)))
+    return images
+
+
+SPI_SETDESKWALLPAPER = 20 
+
+# # #Returns correct version of SystemParametersInfo function.
+def get_sys_parameters_info():
+    return ctypes.windll.user32.SystemParametersInfoW 
+
+# # #Function that changes the wallpaper
+def change_wallpaper():
+    sys_parameters_info = get_sys_parameters_info()
+    r = sys_parameters_info(SPI_SETDESKWALLPAPER, 0, WALLPAPER_PATH, 3)
+    if not r:
+        print(ctypes.WinError())
+
+# # #Function that gets current time
+now = datetime.now()
+
+# # #Setting time for wallpaper changing
+today6am = now.replace(hour=6, minute=0, second=0, microsecond=0)
+
+# # #At 6am the wallpaper changes
+WALLPAPER_PATH=""
+if __name__=="__main__":
+    
+    image_files = get_images()
+    random.shuffle(image_files)
+    if(today6am==now):
+        WALLPAPER_PATH = image_files[1]
+    
+    change_wallpaper()
\ No newline at end of file
diff --git a/week-3/Nazrulhasan_Alam/wallpapers/hao-wang-pVq6YhmDPtk-unsplash.jpg b/week-3/Nazrulhasan_Alam/wallpapers/hao-wang-pVq6YhmDPtk-unsplash.jpg
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diff --git a/week-3/Nazrulhasan_Alam/wallpapers/pawel-nolbert-4u2U8EO9OzY-unsplash.jpg b/week-3/Nazrulhasan_Alam/wallpapers/pawel-nolbert-4u2U8EO9OzY-unsplash.jpg
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diff --git a/week-3/Nazrulhasan_Alam/wallpapers/rohan-aggarwal-EShGwCZs3Nc-unsplash.jpg b/week-3/Nazrulhasan_Alam/wallpapers/rohan-aggarwal-EShGwCZs3Nc-unsplash.jpg
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diff --git a/week-3/Nazrulhasan_Alam/wallpapers/unsplash-retro-cyberpunk.png b/week-3/Nazrulhasan_Alam/wallpapers/unsplash-retro-cyberpunk.png
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