diff --git a/README.md b/README.md
index 5d47007..766097b 100644
--- a/README.md
+++ b/README.md
@@ -1,21 +1,23 @@
 # lua-buffer
-AS3 ByteArray class for lua.
+AS3 ByteArray module for lua.
 
-# usage
-add the module: 
+# usage: 
+To add this module to lvm, call luaopen_bytearr when initialize the lua aux lib.
 
 ```lua
 luaopen_bytearr(L);
 ```
 
 # constant
-ByteArray.LITTLE_ENDIAN - 0   
-ByteArray.BIG_ENDIAN - 1
+```lua
+ByteArray.LITTLE_ENDIAN = 0
+ByteArray.BIG_ENDIAN    = 1
+```
 
 # 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.   
+`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
@@ -25,15 +27,15 @@ local z = ByteArray.load( "hello" ) -- create a byte array with a lua string obj
 ```
 
 # 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.   
-readUnsignedShort() - Read a 16-bit unsigned integer from byte array.   
-readInt() - Read a 32-bit signed integer from byte array.   
-readUnsignedInt() - Read a 32-bit unsigned integer from byte array.   
-readFloat() - Read a 32-bit float from byte array.   
-readDouble() - Read a 64-bit float from byte array.   
-readCString() - Read a string end with \0 from byte array.   
+`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.   
+`readUnsignedShort()` Read a 16-bit unsigned integer from byte array.   
+`readInt()` Read a 32-bit signed integer from byte array.   
+`readUnsignedInt()` Read a 32-bit unsigned integer from byte array.   
+`readFloat()` Read a 32-bit float from byte array.   
+`readDouble()` Read a 64-bit float from byte array.   
+`readCString()` Read a string end with \0 from byte array.   
 return - data read
 
 ```lua
@@ -44,15 +46,15 @@ local c = buf:readShort() -- c == 0x0403
 ```
 
 # 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.   
-writeUnsignedShort( u16 ) - Write a 16-bit unsigned integer to byte array.   
-writeInt( s32 ) - Write a 32-bit signed integer to byte array.   
-writeUnsignedInt( u32 ) - Write a 32-bit unsigned integer to byte array.   
-writeFloat( f32 ) - Write a 32-bit float to byte array.   
-writeDouble( f64 ) - Write a 64-bit float to byte array.   
-writeCString( str ) - write a string end with \0 to byte array.   
+`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.   
+`writeUnsignedShort( u16 )` Write a 16-bit unsigned integer to byte array.   
+`writeInt( s32 )` Write a 32-bit signed integer to byte array.   
+`writeUnsignedInt( u32 )` Write a 32-bit unsigned integer to byte array.   
+`writeFloat( f32 )` Write a 32-bit float to byte array.   
+`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
@@ -61,8 +63,8 @@ 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. 
+`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 )