its layering, there is ALOT of wifi inside a E-HOLE, so it doesn't become BHOL
What does this do, anyways?
Yellow signs work as buttons, they create a spark on the pixel they point to (assuming it's conductive) when you click on it, regardless of what element you have selected (assuming its not the sign tool or the mod element that deletes walls, signs and elements)
Mouse over the WIFI. No, don't, DON'T!!!!!!
Spark the INST (or just make your brush really big and click in the genral area)