Standard abbreviations
Shuttle and ball  using CWM
JLP - join long picot to form double picot, adjust loops.
RW only when stated
All adjoining Trefoils are joined to each other, also the first and last are joined.
Picot sizes
 --  joining picot
 ---- very long picot
 --------- decorative picot needs to be at least 1 1/4  inches so it can be come a double picot.  Larger size threads may need longer picot.
Large Trefoil
R 6 --3--3
R 3 + 5 -------- 2 -- 2  JLP 5 -- 3
R 3  + 3 -- 6  RW
C 8
Small Trefoil
R 4 -- 2 --2
R 2 + 4 ---- (center of snowflake) 4 -- 2 R  2 + 2 -- 4
C 8 RW
Large Trefoil
R 6 + 3--3
R 3 + 5 -------- 2 -- 2  JLP 5 -- 3
R 3  + 3 -- 6  RW
C 8  Join to last picot of  small ring ( on small trefoil)
C 8 RW
Large Trefoil
R 6 + 3--3
R 3 + 5 --------  2 --2  JLP 5 -- 3
R 3  + 3 -- 6  RW
C 8
Small Trefoil
R 4 + 2 --2
R 2 + 4 + 4 -- 2
R  2 + 2 -- 4
C 8 RW
Large Trefoil
R 6 + 3--3
R 3 + 5 -------- 2 -- 2  JLP 5 -- 3
R 3  + 3 -- 6  RW
C 8  Join to last picot of  small ring ( on small trefoil)
C 8 RW  Repeat until you have 8 outer Trefoils and 4 inner ones.
Enjoy... feel free to share pattern but please credit the designer,
Thanks, Susan.  My email address is here.