I'm brand new to these boards, so first I'd like to say, HI!
I searched decostar but couldn't find anything on the forums so I'm asking. I'm relatively new to the origami thing. I can make easy stuff like the crane or ninja star. But I thought the design was cool and wanted to try this.
http://dev.origami.com/images_pdf/decostar.pdf
I found this on this website: http://dev.origami.com/diagram.cfm?CurrentPage=5
I can understand up to step 2 (although I don't know what that arrow with the line is?). But there are no words explaining the next few steps.
I know its a lot to ask, but could someone tell me whats going on afterwards?

How did it become curvy on step 4? Step 5 is kind of confusing, but 6 seems relatively easy. And 7 through 9 seems confusing as well. I'm sorry for all these questions.
Thank you