Unstandard bug fixed.

new feature:
+ run code instead of anonymous function
 - note: anonymous function is also usable, but please call them "blocks"
 > will: will support multiline-code soon.

bug fixed:
+ use `end` to return value
 - note: shortcut `()` and javascript-style `valueOf` is also usable
 - note: `end` is not a method. It's a value.