To create a pendant necklace cord, you can use a simple braiding technique. Here is a basic method using three strands of cord:
```markdown
1. Cut three strands of cord to your desired length.
2. Tie a knot at one end to secure the strands together.
3. Separate the strands and start braiding them together.
4. Continue braiding until you reach the desired length.
5. Tie a knot at the other end to secure the braid.
6. Attach a clasp or loop at each end to create a closure for the necklace.
```
You can customize the design by using different types of cords, adding beads or charms, or incorporating different braiding techniques.