Inconspicuous Note (Gnomeregan)

This note is found in front of the Numerical Consoles between the Launch Bay and the Engineering Labs in Gnomeregan after solving the puzzle. It holds the fifth clue for obtaining the Lucid Nightmare, as part of the Riddle of the Lucid Nightmare.

Solution
In the Emerald Nightmare-affected areas of Val'sharah, night elven communities were hastily evacuated when the Nightmare struck. In the house guarded by Wraithtalon in Ash'theran, find a Nightmare Tumor at just inside.

Interact with the tumor and a portion of Il'gynoth spawns a Blingtron's Circuit Design Tutorial minigame-lookalike:
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Click on two nodes to swap their positions. The objective is to turn all the red lines blue. From a large rat's nest of lines, make small polygons.

Once the objective is complete, the sixth Inconspicuous Note spawns on the ground.