I start turning lights on and off around the house, and if they don't identify the order in which I did so, erase them from existence. Next Year, I plan to cover myself in Blue glow stick chemical, and swing a sword at them. Year after that, I want to fire rockets at then shouting in an indistinguishable language. Finally, I plan on the last year, to grow around 600 - maybe 700 feet, and smashing my fist on my porch whenever they arrive.