all you need is a MIRROR.
It works on the principle that, when you look at yourself in a mirror, you arent seeing YOU, per se, but the BACK IN TIME you. How? When you look at a mirror, the light rays start off at your eyeball, bounce on the mirror, get reflected back off into your eye, thus creating the mirrorical picture you see.
Now. it takes TIME for those light rays to do all that stuff, going off your eyes, travelling headfirst into the glass of the mirror with a bang, then painfully lugging the picture off the mirrors surface into your eye again. all this takes time, init? light travels at 3 million miles per second, which means it takes 0.0008763 seconds between the light going outa your eye, and you seeing the YOU in the mirror. in short, you are seeing the YOU that was in existence 0.0008763 seconds in the PAST. you can NEVER see the NOW you. that way, whenever you look in the mirror, you are actually peering INTO THE DARK, SINISTER YAWNING CHASM...OF PAST TIME!!!!
mmmm...