For this pattern, you need red, yellow, blue and green. These colours were the mainstays of that period, and the pattern is best done in them.
1- cover the bath with red.
2-drop on blue and green in the following fashion- the actual number of sopts per row does not really matter, only that they be tolerably close to one another
B G B G B
B G B G B
B G B G B
B G B G B
3- on each drop of blue, place a drop of yellow
4 sprinkle the whole with white
5- curl the pattern. Make the curls about 2 spots wide.
~Notes~
Some vesions ( including the one in the deridiot encyclopaedia) do not place the yellow drops in the blue drops, but rather place them between the blue and green drops.
If it pleases you, you may draw a comb directly through the pattern at step 4. This causes the spots to form jagged edges. When the pattern is combed, an interesting effect is created.