This weakaura have 2 components
1. At the first polarity, it shows Red and Blue icons on your screen
https://clips.twitch.tv/BlightedApatheticLocustPanicVis-egrWiAApRaJxrhiK
2. If your polarity changes then there is visual and audio warning (if it doesn't change then nothing happens)
https://clips.twitch.tv/LitigiousBillowingHabaneroPJSugar-lvXf166E1GMj1-Sr