I found some medical tape in my stock that was used for bandages. That's the black and white strip cut up and painted with a felt tip marker. It's fuzzy!
In starting an journal, just grab ideas wherever you can. The point is to please yourself while learning as much about new technique as possible which means trying everything.
That spiral is carved out of a piece of linoleum. The wave and cloud marks in magenta are made by dabbing acrylic with make-up sponges.
I hope I am encouraging you to start your own journal. You will not believe how much fun it is to re -visit childhood.