diff --git a/draft.md b/draft.md
index dff0ec5..5c96fd0 100644
--- a/draft.md
+++ b/draft.md
@@ -66,4 +66,23 @@ Sec-WebSocket-Protocol: {serverProtocol}
 
 ### Frames
 
-- RFC requires the server to close all connections which sends a non-masked frame
\ No newline at end of file
+- RFC requires the server to close all connections which sends a non-masked frame
+```
+ 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
++-+-+-+-+-------+-+-------------+-------------------------------+
+|F|R|R|R| opcode|M| Payload len |    Extended payload length    |
+|I|S|S|S|  (4)  |A|     (7)     |             (16/64)           |
+|N|V|V|V|       |S|             |   (if payload len==126/127)   |
+| |1|2|3|       |K|             |                               |
++-+-+-+-+-------+-+-------------+ - - - - - - - - - - - - - - - +
+|     Extended payload length continued, if payload len == 127  |
++ - - - - - - - - - - - - - - - +-------------------------------+
+|                               |Masking-key, if MASK set to 1  |
++-------------------------------+-------------------------------+
+| Masking-key (continued)       |          Payload Data         |
++-------------------------------- - - - - - - - - - - - - - - - +
+:                     Payload Data continued ...                :
++ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +
+|                     Payload Data continued ...                |
++---------------------------------------------------------------+
+```
\ No newline at end of file