First time posting just join

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hello everyone. I'm a huge fan of the website and I wanted to post some pics of three breads I made yesterday from the Tartine book and some variations I saw here. 

i have a question. What does it mean when the instructions say to use a "rippen starter"? Sorry english in NOT my first language (is spanish btw)

 

i'll the bread tomorrow so no pics of the crumb.

 

thanks!

So does that means i should feed my starter, wait for it to collapse and then make my levain? when can I take from my starter to make my levain? Right after feeding? When is at the top? Or after it collapses?

thanks