[PD] phasor to square

Hi list!

I need to convert a phasor into a square wave in this way:

phasor:

  /       /      /       /       /      /
/  |    /  |    /  |    /  |    /  |    /  |

/ | / | / | / | / | / | / |/ |/ |/ |/ |/ |

square (2:1): ________ _________ _ | | | | | | | | | | | |____| |____|

so, a relation HIGH:LOW holds a high or a low value (1 or 0) a indicate number of cycles. I need this conversion in order to make a masking, so square doesn't have to be an audio signal necessarily (could be a number upload each phasor cycle).

What could be the best implementation for that scheme?

Saludos!