[Freesurfer] retinotopy and alternating stimulus direction within-run

Hello all,

I am wondering if the FS FAST retinotopy analysis can deal with within-run alternations of stimulus direction. I have collected data in which eccentricity and polar angle were manipulated in separate runs, but within each run, a cycle of stimulation in one direction was followed by a cycle in the opposite direction. For example, 32 s of clockwise-rotating wedges were followed by 32 s of counterclockwise wedges, etc. I realize now that this may not have been a wise choice--does FS FAST have some paradigm file option for alternating stimulation? If not, is my best solution to cut and splice my runs, dividing each into two mini-runs of single-direction stimulation?

Thanks,

Jeff