Step 21:
Continue to:
Add one bead (marked 3) on the right (blue) string, add one more new bead and pass the same string back up through the three beads marked 1, 2 and 3. (from step 18, 19 and 21)
Continue to add 3 more new beads on the same string and crisscross the left (black) string through the last bead added.
Continue to pass the blue string (the one you used to add new beads on) through two old beads from step 8 and step 9 (marked A and B).
Step 22:
Continue to:
Add one bead on the bottom (blue) line, crisscross the top (black) line through the last bead added. Continue to pass the blue string (the one pointing upwards) through one old beads from step 21 (marked A) and pass the black string (the one pointing downwards) through one old beads from step 10 (marked A).
Step 23:
Continue to:
Add two beads on the bottom (black) string and crisscross the top (blue) string through the last added bead. Continue to pass the black string (the one you used to add new beads on) through three old beads from step 21 and 17 (marked A, B and C).
Step 24:
Continue to:
Add one bead on one side of the string and crisscross the other end through this new added bead. (shown where both arrows exit from)
Step 25:
Continue to:
Add three beads on the right (blue) string and crisscross the left (black) string through the last added bead. Continue to pass the blue string, the one you used to add new beads on, through one old bead from step 23 (marked A).
Step 26:
Continue to:
Add two beads on the top (black) string, crisscross the bottom (blue) string through the last added bead. Continue to pass the black string (the one you used to add new beads on) through one old bead from step 11 (marked A).
Step 27:
Continue to:
Add two beads on the top (blue) string and crisscross the bottom (black) string through the last added bead. Continue to pass the blue string, the one you used to add new beads on, through one old bead from step 12 (marked A).
Step 28:
Continue to:
Add two beads on the top left (black) string, crisscross the bottom right (blue) string through the last bead added. Continue to pass the black string (the one you used to add new beads on) through one old bead from step 13 (marked A).
Step 29:
Continue to:
Add two beads on the left (blue) string, crisscross the right (black) string through the last bead added. Continue to pass the blue string (the one you used to add new beads on) through one old bead from step 14 (marked A).
Step 30:
Continue to:
Add two beads on the left (black) string, crisscross the right (blue) string through the last bead added. Continue to pass the black string (the one you used to add new beads on) through one old bead from step 15 (marked A).
Step 31:
Continue to:
Add two beads on the bottom (blue) string, crisscross the top (black) string through the last bead added. Continue to pass the blue string (the one you used to add new beads on) through two old beads from step 16 and 25 (marked A and B).
Step 32:
Continue to:
Add one bead on one side of the string and crisscross the other end through this new added bead. (shown where both arrows exit from)
Step 33:
Continue to:
Add three beads on the bottom (blue) string, crisscross the top (black) string through the last bead added. Continue to pass the blue string (the one you used to add new beads on) through one old bead from step 25 (marked A).
Step 34:
Continue to:
Add two beads on the right (black) string, crisscross the left (blue) string through the last bead added. Continue to pass the black string (the one you used to add new beads on) through one old bead from step 26 (marked A).
Step 35:
Continue to:
Add two beads on the top (blue) string, crisscross the bottom (black) string through the last bead added. Continue to pass the blue string (the one you used to add new beads on) through one old bead from step 27 (marked A).