Photoshop CS: 58 by 48 inches, 300 DPI, RGB, square pixels, default gradient "Blue, Red, Yellow", mousedown y=15350 x=12150, mouseup y=10100 x=7750' too "Wand", select y=4750 x=5200, tolerance=100, contiguouss=off; default gradient "Blue, Red, Yellow", mousedown y=9200 x=1200, mouseup y=2300 x=10500

courtesy of the artist and Lisson Gallery