trying to get a frost nova round robin going and doesnt seem to want to work for me

/castsequence reset=0 Frost Nova,,,,,
/castsequence reset=0 ,Frost Nova,,,,
/castsequence reset=0 ,,Frost Nova,,,
/castsequence reset=0 ,,,Frost Nova,,


i plan to 4 box frost mages for a while to see how it goes