when architecture is a sky and windows are rainbows...

"unannounced public panam building spectrum light show

in each room of the panam building which has windows should be placed lightbulbs of the major hues: red, orange, yelllow, green, blue, and violet. the number of bulbs in each room should be determined by the size of the room and the number of windows so that each window emits the same amount of light.

the show will be given at dusk or after dark with the least amount of public announcement as is possible. acceptable exceptions: police and city officials and companies renting space in the building.

the lights are to be lit in the following order: red for ten minutes, orange for ten minutes, and so on through violet. the show should last one hour."

stephen james kaltenbach, from arte povera, 1969