Repairing a Tutorials

I was working on a tutorial: (which is great btw)
And i got pretty far until I realized I must have deleted some components by accident I don’t know how to repair them. :spin:
Haha any help would be appreciated.
Here is the a pic of my problem
The red is what I need to fix.
I’m not sure how to attach a .blend? :confused:


Well, you want to fill the gap? Select three vertices (triangle shape) at a time and press F key then the last four ( the square)…that’s all