I am sorry, but I can't speak Japanese (>o<)
This thing is also older, but I never uploaded it anywhere.
I hope this helps to get the idea of the Gardient with this:
Also here is a lazily done example image (which I will reuse) (-w-)
You can also download it on Deviantart:
http://i-yuniku.deviantart.com/art/Silly-Stripy-Gardient-for-CSP-MS-604996155