Thanks for your fast feedback and for your script misohoza, but yes I mean to do it on Flexphraser. I think it need an internal script inside the element FlexPhraserStepSeq (in the basic control templates).
Probably today, I went close, but I think is needed a part of script that include the interval of the step to reset (for examples 1 to 32) and use it to create a unique defineParameter. I explored the FlexPhraserStepSeq inside script and probably the interval have to includes all values of integer @VarEnable… 
I finished to create my amazing own interface synth, it would be the cherry on the cake 