Set up the overlay script

.gitignore

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+config.json
+
+# Created by https://www.toptal.com/developers/gitignore/api/python,virtualenv
+# Edit at https://www.toptal.com/developers/gitignore?templates=python,virtualenv
+
+### Python ###
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+pip-wheel-metadata/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+.python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+### VirtualEnv ###
+# Virtualenv
+# http://iamzed.com/2009/05/07/a-primer-on-virtualenv/
+[Bb]in
+[Ii]nclude
+[Ll]ib
+[Ll]ib64
+[Ll]ocal
+[Ss]cripts
+pyvenv.cfg
+pip-selfcheck.json
+
+# End of https://www.toptal.com/developers/gitignore/api/python,virtualenv

.vscode/settings.json

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+{
+    "python.pythonPath": "venv\\Scripts\\python.exe"
+}

overlay.py

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+from PIL import Image, ImageDraw, ImageFont
+
+def sub(p1, p2):
+    return (p1[0] - p2[0], p1[1] - p2[1])
+
+def overlay(image_in, image_out):
+    image = image_in.convert("RGBA")
+
+    size = image.size
+    center = (size[0]/2, size[1]/2)
+    message = "YOU DIED"
+    font_size = size[1] // 6
+    gradient_range = size[1] // 10
+
+    rect_top = sub(center, (0, font_size * 3 // 4))
+    rect_bot = sub(center, (0, -font_size * 3 // 4))
+
+    overlay = Image.new("RGBA", size, (0,0,0,0))
+
+    draw = ImageDraw.Draw(overlay)
+    font = ImageFont.truetype("OptimusPrinceps.ttf", font_size)
+
+    draw.rectangle([0, rect_top[1], size[0], rect_bot[1]], fill=(0,0,0))
+
+    for y in range(-1, -gradient_range - 1, -1):
+        c = 255 - 255 * (-y) // gradient_range
+        draw.line([0, rect_top[1] + y, size[0], rect_top[1] + y], fill=(0,0,0,c))
+
+    for y in range(1, gradient_range + 1, 1):
+        c = 255 - 255 * (y) // gradient_range
+        draw.line([0, rect_bot[1] + y, size[0], rect_bot[1] + y], fill=(0,0,0,c))
+
+    text_size = draw.textsize(message, font=font)
+    offset = (center[0] - text_size[0]/2, center[1] - text_size[1]/2)
+
+    draw.text(offset, message, (255,0,0), font=font)
+
+    result = Image.alpha_composite(Image.alpha_composite(image, Image.new("RGBA", size, (0,0,0,100))), overlay)
+    return result