from PIL import Image, ImageDraw, ImageFont

def sub(p1, p2):
    return (p1[0] - p2[0], p1[1] - p2[1])

def overlay(image_in):
    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