Help find a custom mod (Portal 2)

Greetings. I remember that once I downloaded a mod, it was a set of test chambers, like 7 or 10 chambers, with automatic transitions between levels. The name had something related to the number of chambers, I don’t remember exactly - 7 (10) test chambers. When the mod was installed, a separate item appeared in the main menu of the game to launch the mod. All cards were in the style of a new aperture. It was like a cube that shoots with blue gel. Help remember the name and find this mod again.

Ps has already found it. It's just that this time it was not installed correctly for me, so it did not appear as a separate item in the menu.