I would modify my portal gun... i mean... theres only blue and orange... How about having 29 or 304 colour pairs, NOW THATS POSSIBILLITYES!!!
I would take a big badass magnet and a large electromagnet and make a rail for the magnet to travel through an inf. loop on... free current... or actually not, cus we need to make something rotate to make AC current.
Then i would make a tube with water (inf. loop) and have a water driven wheel to make my current.
also making travel easy... (one pink one in my room behind a closet, the other in my girlfreinds room 10 miles away, pink is ugly anyway, wouldn't use it anyway)
or cannons... (inf. loop + cannon ball, wait... then make a portal on a wall...)
Space travels! (one on moon other in an airlock, yay 0.15 g! *jumps twice his own height*)
two giant portals on ground... no gravity when lying still in the middle of 'em
Play baseball with myself...
Make a real paradox using all 29 or 304 pairs
Make my room look 4000 times bigger
Play tag with myself!
Earn shitloads of cash (dont know how but no stealing)
I GOT IT! inf loop in a swimming pool (one on bottom, one in ceiling, lol)
Water fountain (portal on bottom of ocean, portal on a wall facing sea, hilarious)
Make a weird game of wack a mole (dont ask, got no idea how)
Break the laws of physics...
Do it again...
and again...
Make inf. loop on jupiter accelerate space ship to 99.9% lightspeed, fly to the stars.
Loop random stuff...
take a shit in a portal, teleporting my shit to the top of empire state building...
amplify sound (dont ask about how)
aahhh... ship propulsion, one on ocean floor, one on back of ship
spend the rest of my life having fun...