cabled vest/cowl - *Inspiration* this one is knit but you could easily crochet this so pull out your favorite scarf pattern and get to crocheting. You may need to adjust the width of the scarf. Once your scarf is long enough, wrap it around yourse.
For the Mandala flower, here is a step-by-step photo gallery. To do this you start at step 1 with 7 strings attached and 6 with Einhängeschlingen on 7 folded thread. Other threads are then inserted by most of us with an ordinary shoelace knot.