Whipping is a traditional way of neatening and securing the cut end of a piece of rope, to stop it unravelling and splaying out. The simplest type of whipped end is done as follows. I’ll call the thicker cordage that is to be neatened “rope” and the thin cordage that will do the whipping “cord”, but there’s no reason why you can’t whip at a smaller scale as in the photos, or even use sewing thread to whip the end of a length of fine cord.
Continue wrapping, pulling the cord fairly tight and having each coil touching the preceding coil with no gaps between them. Keep going until the wrapped length of rope is however long you think looks right. Somewhere between 1 and 2 rope diameters should be OK. Stop while there is still some loop that is uncovered.
Before the loop disappears completely under the whipping, apply some tension to the other end of the cord at the same time. The two ends are now looped through each other and the aim is to control this point of interlinking to get it to end up approximately in the middle of the length of whipping.