diff --git a/atlasimagecomposer/__main__.py b/atlasimagecomposer/__main__.py
deleted file mode 100644
index 96b0672..0000000
--- a/atlasimagecomposer/__main__.py
+++ /dev/null
@@ -1,3 +0,0 @@
-from .compose import run
-
-run()
diff --git a/atlasimagecomposer/backend/__init__.py b/atlasimagecomposer/backend/__init__.py
new file mode 100644
index 0000000..e595ea5
--- /dev/null
+++ b/atlasimagecomposer/backend/__init__.py
@@ -0,0 +1 @@
+from .compose import compose
diff --git a/atlasimagecomposer/atlas.py b/atlasimagecomposer/backend/atlas.py
similarity index 74%
rename from atlasimagecomposer/atlas.py
rename to atlasimagecomposer/backend/atlas.py
index dbf5500..3c7f89b 100644
--- a/atlasimagecomposer/atlas.py
+++ b/atlasimagecomposer/backend/atlas.py
@@ -1,10 +1,10 @@
 import requests
 
-from .cli import Paths, ExpressionDefaults
+from ..config import Paths, ExpressionDefaults, AtlasDefaults
 
 
 def fetch_image(servantid: str, imageid: str):
-    atlasurl = f"https://static.atlasacademy.io/JP/CharaFigure/{imageid}/{imageid}_merged.png"
+    atlasurl = f"https://static.atlasacademy.io/{AtlasDefaults.REGION}/CharaFigure/{imageid}/{imageid}_merged.png"
 
     savefolder = Paths.IMAGES / servantid
     if not savefolder.is_dir():
@@ -21,7 +21,7 @@ def fetch_image(servantid: str, imageid: str):
             handle.write(block)
 
 def fetch_info(servantid: str):
-    atlasurl = f"https://api.atlasacademy.io/basic/JP/servant/{servantid}?lang=en"
+    atlasurl = f"https://api.atlasacademy.io/basic/{AtlasDefaults.REGION}/servant/{servantid}?lang=en"
 
     response = requests.get(atlasurl, timeout=10)
     if not response.ok:
@@ -32,7 +32,7 @@ def fetch_info(servantid: str):
 
 def fetch_data(servantid: str):
     fetch_info(servantid)
-    atlasurl = f"https://api.atlasacademy.io/raw/JP/servant/{servantid}?lore=false&expand=true&lang=en"
+    atlasurl = f"https://api.atlasacademy.io/raw/{AtlasDefaults.REGION}/servant/{servantid}?lore=false&expand=true&lang=en"
 
     response = requests.get(atlasurl, timeout=10)
     if not response.ok:
diff --git a/atlasimagecomposer/compose.py b/atlasimagecomposer/backend/compose.py
similarity index 56%
rename from atlasimagecomposer/compose.py
rename to atlasimagecomposer/backend/compose.py
index 409bdca..058be84 100644
--- a/atlasimagecomposer/compose.py
+++ b/atlasimagecomposer/backend/compose.py
@@ -1,23 +1,16 @@
 import math
 import pathlib
 import sys
+from typing import Tuple
 
 import numpy as np
 from PIL import Image
 from tqdm.contrib import itertools as tqdm_itertools
 
 from .atlas import fetch_data, fetch_image
-from .cli import ExpressionDefaults, Paths
+from ..config import ExpressionDefaults, Paths
 
-
-def welcome():
-    print("-------------------------------------------------")
-    print("  Welcome to the FGO Sprite loader and composer  ")
-    print("               developed by Firq                 ")
-    print("-------------------------------------------------")
-
-def run():
-    welcome()
+def compose():
     Paths.IMAGES.mkdir(exist_ok=True)
     Paths.OUTPUT.mkdir(exist_ok=True)
 
@@ -39,7 +32,36 @@ def run():
         process_sprite(f, sprites[f.stem]["position"], sprites[f.stem]["faceSize"], servantid)
     print(f"Files have been saved at: {(Paths.OUTPUT / servantid).absolute()}")
 
-def process_sprite(filepath: pathlib.Path, position: tuple, faceSize: int, servantid: str):
+
+def override_expressions(expressions: Image.Image, facesize: int) -> Tuple[Image.Image, int]:
+    exp_w, exp_h = expressions.size
+    composites, offset, floating_offset = [], facesize / 5, 0
+    per_composite = (ExpressionDefaults.faceSize * 4) // facesize
+
+    # Why ..........
+    composite_count = math.ceil((exp_h - 1280) / (offset + facesize * per_composite)) + 1
+
+    # Remove top offset
+    expressions = expressions.crop((0, 256, exp_w, exp_h))
+
+    for count in range(0, composite_count):
+        # width_topleft, height_topleft, width_botright, height_botright
+        composites.append((0, 3 * count * facesize + floating_offset, exp_w, (3 * count + 3) * facesize + floating_offset - 1 ))
+        floating_offset += offset
+
+    # Create new expression image, then add all compositions to it
+    overrides = Image.new("RGBA", (exp_w, facesize * composite_count * 3), (255, 0, 0, 0))
+    for idx, c in enumerate(composites):
+        crop = expressions.crop(c)
+        pos = (0, idx * 3 * facesize)
+        overrides.paste(crop, pos, crop)
+
+    # Override expressions sheet
+    return overrides.copy(), per_composite
+
+
+# pylint: disable=too-many-locals
+def process_sprite(filepath: pathlib.Path, position: tuple, facesize: int, servantid: str):
     im = Image.open(filepath)
     width, height = im.size
 
@@ -48,44 +70,16 @@ def process_sprite(filepath: pathlib.Path, position: tuple, faceSize: int, serva
     expressions = im.crop((0, 768, width, height))
 
     expressionwidth, expressionheight = expressions.size
-    rows = expressionheight // faceSize
-    expressions_p_row = expressionwidth // faceSize
+    rows = expressionheight // facesize
+    expressions_p_row = expressionwidth // facesize
 
     exp_per_row = 4
 
-    if faceSize != ExpressionDefaults.faceSize:
-        w, h = expressions.size
-        composites = []
-
-        per_composite = (1280 - ExpressionDefaults.faceSize) // faceSize
-        exp_per_row = per_composite
-
-        offset = (faceSize * ExpressionDefaults.faceSize) / 1280
-        composite_count = math.ceil((h - 1280) / (offset + faceSize * per_composite)) + 1
-
-        expressions = expressions.crop((0, 256, w, h))
-        floating_offset = 0
-        for count in range(0, composite_count + 1):
-            composites.append((
-                0,
-                3 * count * faceSize + floating_offset,
-                w,
-                (3 * count + 3) * faceSize + floating_offset - 1
-            ))
-            floating_offset += offset
-
-        overrides = Image.new("RGBA", (w, faceSize * composite_count * 3), (255, 0, 0, 0))
-        for idx, c in enumerate(composites):
-            crop = expressions.crop(c)
-            pos = (
-                0,
-                idx * 3 * faceSize,
-            )
-            overrides.paste(crop, pos, crop)
-        expressions = overrides.copy()
+    if facesize != ExpressionDefaults.faceSize:
+        expressions, exp_per_row = override_expressions(expressions, facesize)
 
     for x, y in tqdm_itertools.product(range(0, rows), range(0, expressions_p_row, 1), ascii="-="):
-        img = generate_sprite(main_sprite, expressions, x, y, position, faceSize)
+        img = generate_sprite(main_sprite, expressions, x, y, position, facesize)
         if img is not None:
             save_sprite(img, servantid, filepath.stem, (x, y, exp_per_row))
 
@@ -97,21 +91,22 @@ def is_empty(img: Image.Image):
         return True
     return False
 
-def generate_sprite(sprite: Image.Image, expressions: Image.Image, row: int, col: int, position: tuple, faceSize: int) -> Image.Image | None:
+# pylint: disable=too-many-arguments
+def generate_sprite(sprite: Image.Image, expressions: Image.Image, row: int, col: int, position: tuple, facesize: int) -> Image.Image | None:
     area = (
-        col * faceSize,
-        row * faceSize,
-        (col + 1) * faceSize - 1,
-        (row + 1) * faceSize - 1
+        col * facesize,
+        row * facesize,
+        (col + 1) * facesize - 1,
+        (row + 1) * facesize - 1
     )
 
     expression = expressions.crop(area)
     if is_empty(expression):
         return None
 
-    compose = sprite.copy()
-    compose.paste(expression, position, expression)
-    return compose
+    composition = sprite.copy()
+    composition.paste(expression, position, expression)
+    return composition
 
 def save_sprite(image: Image.Image, folder: str, name: str, rowcol: tuple | None = None):
     savefolder = Paths.OUTPUT / folder
diff --git a/atlasimagecomposer/cli/__init__.py b/atlasimagecomposer/cli/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/atlasimagecomposer/cli.py b/atlasimagecomposer/cli/cli.py
similarity index 66%
rename from atlasimagecomposer/cli.py
rename to atlasimagecomposer/cli/cli.py
index 86660d0..a0d9657 100644
--- a/atlasimagecomposer/cli.py
+++ b/atlasimagecomposer/cli/cli.py
@@ -2,7 +2,9 @@ import argparse
 import pathlib
 import sys
 
-from . import __version__
+from .. import __version__
+from ..backend import compose
+from ..config import Paths
 
 
 # pylint: disable=too-few-public-methods
@@ -28,13 +30,16 @@ def parse_arguments():
     args, extra_args = parser.parse_known_args(sys.argv[1:], namespace=args)
     return args, extra_args
 
-class Paths:
-    _root = pathlib.Path(__file__).parent
-    _args, _ = parse_arguments()
-    IMAGES = _root / ".temp"
-    OUTPUT = _root / ".out"
-    if _args.output:
-        OUTPUT = pathlib.Path(_args.output)
+def welcome():
+    print("-------------------------------------------------")
+    print("  Welcome to the FGO Sprite loader and composer  ")
+    print("               developed by Firq                 ")
+    print("-------------------------------------------------")
 
-class ExpressionDefaults:
-    faceSize = 256
+def run():
+    args, _ = parse_arguments()
+    if args.output:
+        Paths.OUTPUT = pathlib.Path(args.output)
+
+    welcome()
+    compose()
diff --git a/atlasimagecomposer/config/__init__.py b/atlasimagecomposer/config/__init__.py
new file mode 100644
index 0000000..38a49fd
--- /dev/null
+++ b/atlasimagecomposer/config/__init__.py
@@ -0,0 +1 @@
+from .config import AtlasDefaults, ExpressionDefaults, Paths
diff --git a/atlasimagecomposer/config/config.py b/atlasimagecomposer/config/config.py
new file mode 100644
index 0000000..091f8b7
--- /dev/null
+++ b/atlasimagecomposer/config/config.py
@@ -0,0 +1,13 @@
+# pylint: disable=too-few-public-methods
+import pathlib
+
+class Paths:
+    _root = pathlib.Path(__file__).parents[1]
+    IMAGES = _root / ".temp"
+    OUTPUT = _root / ".out"
+
+class ExpressionDefaults:
+    faceSize = 256
+
+class AtlasDefaults:
+    REGION = "JP"
diff --git a/pyproject.toml b/pyproject.toml
index dafa1bd..692e76e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "atlasimagecomposer"
-version = "0.1.0-a.4"
+version = "0.1.0-a.5"
 dependencies = [
     "numpy~=2.0.1",
     "pillow~=10.4.0",
@@ -20,7 +20,7 @@ classifiers = [
 ]
 
 [project.scripts]
-atlasimagecomposer = "atlasimagecomposer.compose:run"
+atlasimagecomposer = "atlasimagecomposer.cli.cli:run"
 
 [tool.setuptools.packages.find]
 where = ["."]