diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..90a4db3
Binary files /dev/null and b/.DS_Store differ
diff --git a/.gitignore b/.gitignore
index b6e4761..169647b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 # Byte-compiled / optimized / DLL files
+.DS_Store
 __pycache__/
 *.py[cod]
 *$py.class
diff --git a/Dockerfile b/Dockerfile
index 564232d..3a1f66f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,6 +5,6 @@ ADD requirements.txt /requirements.txt
 RUN pip install -r requirements.txt
 
 # Copy code.
-ADD main.py /main.py
+ADD dark.py /dark.py
 
-CMD ["python", "/main.py"]
+CMD ["python", "/dark.py"]
diff --git a/dark.py b/dark.py
new file mode 100644
index 0000000..e77dcf2
--- /dev/null
+++ b/dark.py
@@ -0,0 +1,79 @@
+#dark.py
+"""
+GitHub Action Code to update README file with provided images randomly.
+"""
+
+import os
+import re
+import sys
+import base64
+import requests
+import random
+from github import Github, GithubException
+
+START_COMMENT = '<!--START_SECTION:update_image_dark-->'
+END_COMMENT = '<!--END_SECTION:update_image_dark-->'
+IMAGE_REPL = f"{START_COMMENT}[\\s\\S]+{END_COMMENT}"
+
+REPO = os.getenv("INPUT_README_REPOSITORY")
+IMG_REPO = os.getenv("INPUT_IMG_REPOSITORY")
+IMG_PATH = os.getenv("INPUT_IMG_PATH")
+GHTOKEN = os.getenv("INPUT_GH_TOKEN")
+COMMIT_MSG = os.getenv("INPUT_COMMIT_MESSAGE")
+WIDTH = os.getenv("INPUT_WIDTH")
+HEIGHT = os.getenv("INPUT_HEIGHT")
+ALIGN = os.getenv("INPUT_ALIGN")
+IMG_ALT = os.getenv("INPUT_IMG_ALT")
+
+VALID_IMAGES_EXT = ['png', 'jpg', 'jpeg', 'gif', 'svg']
+
+
+def verify_image_ext(image):
+    ''' Validate image obtained '''
+    global VALID_IMAGES_EXT
+    if image.path.split('/')[-1].split('.')[-1].lower() not in VALID_IMAGES_EXT:
+        print(f"Please make sure image is one of following type {VALID_IMAGES_EXT}, error caused by image - {image.path}")
+        return False
+    return True
+
+def get_image_tag(repo):
+    ''' Get new image tag <img> to place in README '''
+    global IMG_PATH
+    images = repo.get_contents(IMG_PATH)
+    image = random.choice(images)
+    is_image = verify_image_ext(image)
+    if not is_image:
+        sys.exit(1)
+    img_src = image.download_url
+    img_tag = f"<img src=\"{img_src}#gh-dark-mode-only\" title=\"Hello! 😇💙\" height={HEIGHT} width={WIDTH} align={ALIGN} alt={IMG_ALT} />"
+    return img_tag
+
+def decode_readme(data: str) -> str:
+    '''Decode the contents of old readme'''
+    decoded_bytes = base64.b64decode(data)
+    return str(decoded_bytes, 'utf-8')
+
+def generate_new_readme(readme: str, image_tag: str) -> str:
+    '''Generate a new Readme.md'''
+    update_readme_with = f"{START_COMMENT}\n{image_tag}\n{END_COMMENT}"
+    return re.sub(IMAGE_REPL, update_readme_with, readme)
+
+if __name__ == "__main__":
+    g = Github(GHTOKEN)
+    try:
+        readme_repo = g.get_repo(REPO)
+        img_repo = g.get_repo(IMG_REPO)
+    except GithubException:
+        print("Authentication Error. Try saving a GitHub Token in your Repo Secrets or Use the GitHub Actions Token, which is automatically used by the action.")
+        sys.exit(1)
+    image_tag = get_image_tag(img_repo)
+    readme_obj = readme_repo.get_readme()
+    readme_content = readme_obj.content
+    readme_content_decoded = decode_readme(readme_content)
+    new_readme = generate_new_readme(readme=readme_content_decoded, image_tag=image_tag)
+    if readme_content_decoded != new_readme:
+        readme_repo.update_file(path=readme_obj.path, message=COMMIT_MSG,
+                             content=new_readme, sha=readme_obj.sha)
+        print("Success")
+    else:
+        print("No change")
\ No newline at end of file
diff --git a/docker_entrypoint.sh b/docker_entrypoint.sh
new file mode 100644
index 0000000..1f1632c
--- /dev/null
+++ b/docker_entrypoint.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+
+python light.py &
+python dark.py 
\ No newline at end of file
diff --git a/light.py b/light.py
new file mode 100644
index 0000000..a6cb50f
--- /dev/null
+++ b/light.py
@@ -0,0 +1,79 @@
+#light.py
+"""
+GitHub Action Code to update README file with provided images randomly.
+"""
+
+import os
+import re
+import sys
+import base64
+import requests
+import random
+from github import Github, GithubException
+
+START_COMMENT = '<!--START_SECTION:update_image_light-->'
+END_COMMENT = '<!--END_SECTION:update_image_light-->'
+IMAGE_REPL = f"{START_COMMENT}[\\s\\S]+{END_COMMENT}"
+
+REPO = os.getenv("INPUT_README_REPOSITORY")
+IMG_REPO = os.getenv("INPUT_IMG_REPOSITORY")
+IMG_PATH = os.getenv("INPUT_IMG_PATH")
+GHTOKEN = os.getenv("INPUT_GH_TOKEN")
+COMMIT_MSG = os.getenv("INPUT_COMMIT_MESSAGE")
+WIDTH = os.getenv("INPUT_WIDTH")
+HEIGHT = os.getenv("INPUT_HEIGHT")
+ALIGN = os.getenv("INPUT_ALIGN")
+IMG_ALT = os.getenv("INPUT_IMG_ALT")
+
+VALID_IMAGES_EXT = ['png', 'jpg', 'jpeg', 'gif', 'svg']
+
+
+def verify_image_ext(image):
+    ''' Validate image obtained '''
+    global VALID_IMAGES_EXT
+    if image.path.split('/')[-1].split('.')[-1].lower() not in VALID_IMAGES_EXT:
+        print(f"Please make sure image is one of following type {VALID_IMAGES_EXT}, error caused by image - {image.path}")
+        return False
+    return True
+
+def get_image_tag(repo):
+    ''' Get new image tag <img> to place in README '''
+    global IMG_PATH
+    images = repo.get_contents(IMG_PATH)
+    image = random.choice(images)
+    is_image = verify_image_ext(image)
+    if not is_image:
+        sys.exit(1)
+    img_src = image.download_url
+    img_tag = f"<img src={img_src} height={HEIGHT} width={WIDTH} align={ALIGN} alt={IMG_ALT} />"
+    return img_tag
+
+def decode_readme(data: str) -> str:
+    '''Decode the contents of old readme'''
+    decoded_bytes = base64.b64decode(data)
+    return str(decoded_bytes, 'utf-8')
+
+def generate_new_readme(readme: str, image_tag: str) -> str:
+    '''Generate a new Readme.md'''
+    update_readme_with = f"{START_COMMENT}\n{image_tag}\n{END_COMMENT}"
+    return re.sub(IMAGE_REPL, update_readme_with, readme)
+
+if __name__ == "__main__":
+    g = Github(GHTOKEN)
+    try:
+        readme_repo = g.get_repo(REPO)
+        img_repo = g.get_repo(IMG_REPO)
+    except GithubException:
+        print("Authentication Error. Try saving a GitHub Token in your Repo Secrets or Use the GitHub Actions Token, which is automatically used by the action.")
+        sys.exit(1)
+    image_tag = get_image_tag(img_repo)
+    readme_obj = readme_repo.get_readme()
+    readme_content = readme_obj.content
+    readme_content_decoded = decode_readme(readme_content)
+    new_readme = generate_new_readme(readme=readme_content_decoded, image_tag=image_tag)
+    if readme_content_decoded != new_readme:
+        readme_repo.update_file(path=readme_obj.path, message=COMMIT_MSG,
+                             content=new_readme, sha=readme_obj.sha)
+        print("Success")
+    else:
+        print("No change")
\ No newline at end of file