Chinese zodiac of next year

It is already the end of the year, isn't it?
I remember the zodiac when it became the end of the year.
In Japan, we use Chinese zodiac.
In 2012 is the year of the dragon.
The next year is the year of the snake.
Then, I folded a snake.

This snake looks easy.
But, it has strange point.
The length from head to tail is longer than the length of diagonal that is the square paper.
It is mysterious, isn't it?

--- Snake ---

The difficulty	:	**
Time to fold	:	15minutes
Paper info	:	15cm * 15cm (Not cut anywhere)
Reference book	:	Tanteidan Magazine vol.136