An addon that will help you solve Zereth Mortis puzzles
https://www.curseforge.com/wow/addons/zereth-mortis-puzzle-helper
Video explanation by the addon creator
Fugueal Protolock:
Line 1 = Shape (circle, square or hexagon)
Line 2 = How many border lines (1,2 or 3)
Line 3 = Icon in center
Line 4 = How many icons
None the Wiser Guild 