This is a heart cabled hat, that is knitted circularly, and has video tutorial included with a link below the picture in the PDF file. It shows how to do the cabled design knitted circularly, so if you wanted to do a scarf flat the technique would not work the same, but if you wanted to do a scarf knitted circularly it will work.
I used the CinDWood Loom 60 peg 1/2 gauge, but is also written for the 40 peg 1/2 gauge. I used 1 skein to make the hat with bernat blanket yarn, but any bulky yarn will work well for this project.