Google colab of chapter 1

its taking to long, whatever is hidden in your first model
what should i do?

It’s taking long because you’re running all 102 cells. Click the text “102 cells hidden” to unhide them, then run them one by one.

there is no real code cell in there, that’s why i ran that thing as whole to find out what it is.

If you click unhide, there are a bunch of revealed headers with cells also hidden:

These have code cells in them, you just need to click and unhide them.