diff --git a/s2b.rb b/s2b.rb
index cd840fc..c7d2619 100755
--- a/s2b.rb
+++ b/s2b.rb
@@ -1,12 +1,12 @@
 # Massconverter from .schematic files to .bo2 files
 # Usage: ruby s2b.rb
-#        This will convert all schematics in the sibling folder "in".
-#        The results will be placed in the folder "out".
-#        Air and magenta colored wool is ignored.
-#        If the file name is ending with R5 the z will use a -5 offset
+#		This will convert all schematics in the sibling folder "in".
+#		The results will be placed in the folder "out".
+#		Air and magenta colored wool is ignored.
+#		If the file name is ending with R5 the z will use a -5 offset
 #
 # See: http://www.minecraftwiki.net/wiki/Schematic_File_Format
-#      https://github.com/Wickth/TerrainControll/blob/master/bo2spec.txt
+#	  https://github.com/Wickth/TerrainControll/blob/master/bo2spec.txt
 #
 # Lisence: MIT
 
@@ -15,11 +15,11 @@ require 'rbconfig'
 # Detect whether script is running on a Mac, change 'require' accordingly.
 hostOs = RbConfig::CONFIG['host_os']
 if /darwin|mac/.match(hostOs)
-    if ! require "/Library/Ruby/Gems/1.8/gems/nbtfile-0.2.0/lib/nbtfile.rb"
-        require "nbtfile"
-    end
+	if ! require "/Library/Ruby/Gems/1.8/gems/nbtfile-0.2.0/lib/nbtfile.rb"
+		require "nbtfile"
+	end
 else
-    require "nbtfile"
+	require "nbtfile"
 end
 
 # Needy blocks are items like torches and doors, which require other blocks to
@@ -107,12 +107,12 @@ def schematicToBO2(schematic, zoffset)
 	data = data.each_slice(schematic["Length"]).to_a
 	layers = blocks.zip(data).map { |blocks, data| blocks.zip(data).map { |blocks, data| blocks.zip(data) } }
 	deferred = []
-    
-    # Utility function that converts lines into strings.
-    def stringifyLine(lineArray)
-        return stringified = "#{lineArray[0]},#{lineArray[1]},#{lineArray[2]}:#{lineArray[3]}.#{lineArray[4]}"
-    end
-    
+	
+	# Utility function that converts lines into strings.
+	def stringifyLine(lineArray)
+		return stringified = "#{lineArray[0]},#{lineArray[1]},#{lineArray[2]}:#{lineArray[3]}.#{lineArray[4]}"
+	end
+	
 	ret.push(*FILE_HEADER)
 	layers.each_with_index do |rows, z|
 		z += zoffset
@@ -123,11 +123,11 @@ def schematicToBO2(schematic, zoffset)
 					next
 				end
 				y -= schematic["Length"] / 2 # Center the object on the Y axis
-                line = [y, x, z, block, data]
+				line = [y, x, z, block, data]
 				if NEEDY_BLOCKS.include?(block)
 					deferred << line
 				else
-                    ret << stringifyLine(line)
+					ret << stringifyLine(line)
 				end
 			end
 		end
@@ -135,13 +135,13 @@ def schematicToBO2(schematic, zoffset)
 	
 	# Write needy blocks to the end of the BOB file, respecting the order of
 	# NEEDY_BLOCKS, in case some blocks are needier than others.
-    deferred.sort! { |a, b| NEEDY_BLOCKS.index(a[3]) <=> NEEDY_BLOCKS.index(b[3]) }
-    deferredStringified = []
-    deferred.each do |lineToStringify|
-        deferredStringified << stringifyLine(lineToStringify)
-    end
-    deferredStringified.reverse.each { |line| ret << line }
-        
+	deferred.sort! { |a, b| NEEDY_BLOCKS.index(a[3]) <=> NEEDY_BLOCKS.index(b[3]) }
+	deferredStringified = []
+	deferred.each do |lineToStringify|
+		deferredStringified << stringifyLine(lineToStringify)
+	end
+	deferredStringified.reverse.each { |line| ret << line }
+		
 	return ret
 end