diff --git a/README.md b/README.md
index c0a382e..5f16055 100644
--- a/README.md
+++ b/README.md
@@ -1,25 +1,25 @@
 # lua-buffer
 AS3 ByteArray class for lua.
 
-#usage
-add the module:
-`
+# usage
+add the module: 
+```lua
 luaopen_bytearr(L);
-`
+```
 
-## constructor
+# constructor
 create( [capacity, [endian]] ) - Create an empty byte array.
 init( [param1, param2, ...] ) - Create a byte array with initial bytes. Parameters should be a list of number or table.
 load( str ) - Create a byte array with lua string object for read data. This byte array is read-only.
 
 return - A ByteArray object.
-`
+```lua
 local x = ByteArray.create()  -- create an empty byte array
 local y = ByteArray.init( 0, 1, 2, 3 ) -- create a byte array with initial bytes
 local z = ByteArray.load( "hello" ) -- create a byte array with a lua string object
-`
+```
 
-## method for read data
+# method for read data
 readByte() - Read a 8-bit signed integer from byte array.
 readUnsignedByte() - Read a 8-bit unsigned integer from byte array.
 readShort() - Read a 16-bit signed integer from byte array.
@@ -31,14 +31,14 @@ readDouble() - Read a 64-bit float from byte array.
 readCString() - Read a string end with \0 from byte array.
 
 return - A lua number object.
-`
-local t = ByteArray.init( 1, 2, 3, 4, 5, 6 )
-local a = t:readByte() -- a == 1
-local b = t:readUnsignedByte() -- b == 2
-local c = t:readShort() -- c == 0x0403
-`
+```lua
+local t = ByteArray.init( 1, 2, 3, 4, 5, 6 ) 
+local a = t:readByte() -- a == 1 
+local b = t:readUnsignedByte() -- b == 2 
+local c = t:readShort() -- c == 0x0403 
+```
 
-## method for write data
+# method for write data
 writeByte( s8 ) - Write a 8-bit signed integer to byte array.
 writeUnsignedByte( u8 ) - Write a 8-bit unsigned integer to byte array.
 writeShort( s16 ) - Write a 16-bit signed integer to byte array.
@@ -50,50 +50,50 @@ writeDouble( f64 ) - Write a 64-bit float to byte array.
 writeCString( str ) - write a string end with \0 to byte array.
 
 return - The ByteArray object itself.
-`
+```lua
 local buf = ByteArray.create()
 buf:writeByte(1):writeByte(2):writeInt(0x0403)
-`
+```
 
-## method for copying data between ByteArray object
-readBytes( to[, offset, length] ) - Read data to first parameter(a ByteArray object), the range for the target byte array is start from offset with length.
-writeBytes( from[, offset, length] ) - Write data from first parameter(a ByteArray object), the range for the data is start from offset with length.
-`
+# method for copying data between ByteArray object
+readBytes( to[, offset, length] ) - Read data to first parameter(a ByteArray object), the range for the target byte array is start from offset with length. 
+writeBytes( from[, offset, length] ) - Write data from first parameter(a ByteArray object), the range for the data is start from offset with length. 
+```lua
 local buf = ByteArray.init( 1, 2, 3, 4, 5 )
 local d = ByteArray.create()
 buf:readBytes( d )
-`
+```
 
-## member position
+# member position
 start position for reading / writing data.
-`
+```lua
 local buf = ByteArray.init( 1, 2, 3, 4, 5 )
 buf.position = 3
 local d = ByteArray.create()
 buf:readBytes( d ) -- buf = <4 5>
 print( buf.position ) -- 5
-`
+```
 
-## member length
+# member length
 set / get length
-`
+```lua
 local buf = ByteArray.init( 1,2,3,4,5,6,7 )
 print( buf.length )
 buf.length = 4
 for i=1, #buf do print(buf[i]) end
-`
+```
 
-## member endian
+# member endian
 set / get endian
-`
+```lua
 local buf = ByteArray.init(2,3)
 buf.endian = ByteArray.LITTLE_ENDIAN
-`
+```
 
-## indexing
+# indexing
 index start from 1 to length. If out of range, return -1.
-`
+```lua
 local buf = ByteArray.init(2,3)
 print(buf[1])
 print(buf[2])
-`
+```