get a silly pictur
put tape on it that you can peel off the non stick side so that you can stick it up on the wall
get to the location and put a map over your painting against the wall pretending youre looking at the map and shit
make your pictur stick to the wall and shit
it looks like its part of the exhibit, but it is infact a silly pictur that is not part of the exhibit but nobody knows that so they admire some shit you put up on the wall

Why take the time out of your day to write that down and spell every word correctly EXCEPT picture? Is it really that hard to press the E key I mean you can do it for every other word but not picture?