The drops are crocheted. Each drop is started with a hanging chain, which is increased to a base ring of 8 or 10 stitches. Crocheting proceeds following a random number table. Each line in the table has 2 elements: number of stitches (1, 2, 3, 4 or 5) and increase vs. decrease. The two elements are randomized separately. For example, a line might read Increase 5, meaning crochet 6 stitches into the stitch, or Decrease 1, meaning crochet next 2 stitches together.
I continued crocheting each drop until the number of stitches reached zero (extinction), or until I had crocheted 160 lines from the random number table. Of 40 drops started with 8 base stitches, 36 decreased to extinction and 4 continued to 160 lines, with an average of 35 lines per drop. Of 40 drops started with 10 stitches, 32 decreased to extinction and 8 continued to 160 lines with an average of 52 lines per drop.
The 20 drops that appear more symmetrical or regular were made following patterns. There are also 10 flower-shaped drops, which were ended early.
The colors were chosen randomly. Two strands are used in each drop, with one strand being repeated in the next drop. Most of the yarns are multicolored.