How to see an enemy if they breach your area.

[Holy Herb]

Okay so me and my friend thought of this idea when we saw a Glowstick Alarm by SurvivorMedic
http://survivormedic.com/2013/05/07/how-...ick-alarm/
We basically did the same but instead we put some razor blades on the Trap so when the enemy trips the alarm the razor blade will stab into the Glowstick it will crack and burst and I don't know if you've ever cut one open out of curiosity but the liquid lights up, now if they get that on their clothes you could see them running or moving due to that liquid if they rubbed it it would only spread more! Obviously you would have to set up enough of these but hey it's just an idea.