How to tie a knot?

1. Straighten the two strings to be connected, as shown in the following figure:

2. Put a rope under another rope, as shown in the figure below:

3. After passing through, the rope is pressed back on itself, as shown in the following figure:

4. As shown in the figure below, pull the other rope in the opposite direction from its lower end:

5. Pass the second rope through its body, as shown in the figure below:

6. Tighten the rope at both ends and tie the fast knot, as shown in the figure below: