5th Lesson... Happy Birthday Guido!

Today I skimmed through step 6 of the tutorial, but hit a hard wall at step 7. I spent most of the lesson trying to find little tidbit semantic errors among my tens of command lines. In the end, I got frustrated and deleted most of my command lines to start fresh. However, the fresh start did not help either, I'm still looking for a way to slash the number of command lines I have. By far, this is the most challenging step...