When creating a gabor patch, how do I change the color of every other bar? The following line produces red bars with every other being light blue. A blue patch yields blue and yellow bars.
gabor = visual.GratingStim(win, tex='sin', mask='gauss', units="deg",size=(4,4), sf=(2,2), color="red")
Could someone explain to me why this is, and if there is a way to control both colors rather than just the one?