Confusing Ayatoweb tutorial (AE)

OK here is the tutorial that is confusing me: .

I have no clue how to to do step one. I mean it just says stuff like
“Create A smooth line using “Wiggler”
Create a New Solid (30x30 Pixel)
Choose Window menu > Wiggler.
Create A smooth locus on a position key frame.
Then, Create another new solid. (640x480 Pixel)
Copy & Paste All key frames to a Mask.”

Now i have no clue how to create a smooth line using wiggler… Can someone please explain how to do these things. Thanks