diff --git a/world_maker/terraforming.py b/world_maker/terraforming.py
index 6273cd7..048297e 100644
--- a/world_maker/terraforming.py
+++ b/world_maker/terraforming.py
@@ -1,10 +1,10 @@
 from typing import Union
 
 import numpy as np
-from gdpc import Editor, Block, geometry, lookup
-from PIL import Image as img
+from gdpc      import Editor, Block, geometry, lookup
+from PIL       import Image as img
 from PIL.Image import Image
-from skimage import morphology
+from skimage   import morphology
 
 from world_maker.data_analysis import handle_import_image
 
@@ -21,23 +21,21 @@ def remove_trees(heightmap: Union[str, Image], treesmap: Union[str, Image], mask
                 max(build_rectangle.end[1], build_rectangle.begin[1]) - min(build_rectangle.end[1], build_rectangle.begin[1]))
 
     heightmap = handle_import_image(heightmap).convert('L')
-    treesmap = handle_import_image(treesmap).convert('L')
-    mask = handle_import_image(mask)
+    treesmap  = handle_import_image(treesmap).convert('L')
+    mask      = handle_import_image(mask)
 
     removed_treesmap = img.new("L", distance, 0)
 
-    for (x, z) in [(x, z) for x in range(distance[0]) for z in range(distance[1])]:
+    for (x, z) in [(x, z) for x in range(distance[0]) for z in range(distance[1])] :
 
         if mask.getpixel((x, z)) != 0 and treesmap.getpixel((x, z)) > 0:
 
             tree_area = morphology.flood(treesmap, (z, x), tolerance=1)
-            removed_treesmap = img.fromarray(
-                np.where(tree_area, treesmap, 0).astype(np.uint8))
+            removed_treesmap = img.fromarray(np.where(tree_area, treesmap, 0).astype(np.uint8))
 
-            y = heightmap.getpixel((x, z))
+            y     = heightmap.getpixel((x, z))
             y_top = removed_treesmap.getpixel((x, z))
-            geometry.placeLine(
-                editor, (start[0] + x, y+1, start[1] + z), (start[0] + x, y_top, start[1] + z), Block('air'))
+            geometry.placeLine(editor, (start[0] + x, y+1, start[1] + z), (start[0] + x, y_top, start[1] + z), Block('air'))
 
     removed_treesmap.save('./world_maker/data/removed_treesmap.png')
     print("[Remove tree] Done.")
@@ -55,40 +53,36 @@ def smooth_terrain(heightmap: Union[str, Image], heightmap_smooth: Union[str, Im
     distance = (max(build_rectangle.end[0], build_rectangle.begin[0]) - min(build_rectangle.end[0], build_rectangle.begin[0]),
                 max(build_rectangle.end[1], build_rectangle.begin[1]) - min(build_rectangle.end[1], build_rectangle.begin[1]))
 
-    heightmap = handle_import_image(heightmap).convert('L')
+    heightmap        = handle_import_image(heightmap).convert('L')
     heightmap_smooth = handle_import_image(heightmap_smooth).convert('L')
-    mask = handle_import_image(mask).convert('L')
+    mask             = handle_import_image(mask).convert('L')
 
     smooth_terrain_delta = img.new("RGB", distance, 0)
 
     slice = editor.loadWorldSlice(build_rectangle)
     smoothable_blocks = lookup.OVERWORLD_SOILS | lookup.OVERWORLD_STONES | lookup.SNOWS
 
-    for x in range(0, distance[0]):
-        for z in range(0, distance[1]):
+    for (x, z) in [(x, z) for x in range(distance[0]) for z in range(distance[1])] :
 
-            if mask.getpixel((x, z)) == 0:
-                continue
-            y = heightmap.getpixel((x, z))
-            y_smooth = heightmap_smooth.getpixel((x, z))
-            delta = y - y_smooth
-            smooth_terrain_delta.putpixel((x, z), delta)
+        if mask.getpixel((x, z)) == 0:
+            continue
+        y        = heightmap.getpixel((x, z))
+        y_smooth = heightmap_smooth.getpixel((x, z))
+        delta = y - y_smooth
+        smooth_terrain_delta.putpixel((x, z), delta)
 
-            if delta == 0:
-                continue
-            block = slice.getBlock((x, y, z))
+        if delta == 0:
+            continue
+        block = slice.getBlock((x, y, z))
 
-            if block.id not in smoothable_blocks:
-                continue
-            if delta > 0:
-                geometry.placeLine(
-                    editor, (start[0] + x, y, start[1] + z), (start[0] + x, y_smooth, start[1] + z), Block('air'))
-                editor.placeBlock(
-                    (start[0] + x, y_smooth, start[1] + z), block)
+        if block.id not in smoothable_blocks:
+            continue
+        if delta > 0:
+            geometry.placeLine(editor, (start[0] + x, y, start[1] + z), (start[0] + x, y_smooth, start[1] + z), Block('air'))
+            editor.placeBlock((start[0] + x, y_smooth, start[1] + z), block)
 
-            else:
-                geometry.placeLine(
-                    editor, (start[0] + x, y, start[1] + z), (start[0] + x, y_smooth, start[1] + z), block)
+        else:
+            geometry.placeLine(editor, (start[0] + x, y, start[1] + z), (start[0] + x, y_smooth, start[1] + z), block)
 
     smooth_terrain_delta.save('./world_maker/data/smooth_terrain_delta.png')
     print("[Smooth terrain] Done.")