Align the two paracord strands so they are side by side, with one color on top of the other. You will be preserving this side-by-side alignment throughout the knot. The color coming from the left side of the card is color A, which is the top color in your alignment. The color coming from the right side of the card is color B, which is the bottom color in your alignment. In the case of this tutorial A is black and B is red, but you are welcome to use whatever colors you wish.