Blood dripping

[yellowhat]

Hi all,
I am a newbie of blender, I want to create a text that is dripping blood like this http://www.youtube.com/watch?v=B5b8moyxZSg; so I googled a bit and I found that it could be done by creating a particle system or a physics fluid
the difficulty is on set the characteristic of the fluid to let the particle slide throught the text.
So could someone post how this characteristic should be?

Thanks