Use the knob at the end of the knitting strip as a fixing aid, because now you turn the strip in front of you so that the thread is on the left side. Loosen the thread and wrap another row of "8 loops".
If you now turn the knitting bar, you will have two loops on each knob. Now you "knit": Use the hook needle to lift the lower stitch over the upper stitch in each knob in the front row from left to right. You can knit the front row and then the back row in this way.
So that you have two stitches per knob again, always zigzag the yarn around the knobs and then knit the resulting stitches again by lifting the lower stitch over the upper stitch.
If you want to use a new wool colour, simply cut the thread of the wool you are using and knot the end with the new wool.
Continue in this way until the scarf has reached the desired length.