Pipe bash reproduction in c

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I work on a Bash reproduction in C for my school. I try to schematize how I will code the pipe | feature and I wanted your advices. I know that there is a lot of solutions for this on the Web but i don't want the code but the way to do that I want. I launched good old paint to show you my vision :

Beautifull sketch

I tried to code a demonstration to prove the concept but it is a fail.
I thought that creating just one pipe for all execves is a very simple solution but i don't know if it could work.

What i'm asking is a more experienced vision to tell me if it could work or not.

Thank you for reading me,

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