The second voltage forms a second write current for {TAIL ~ a second duration} through the resistive sense memory cell in {HEAD ~ a second direction} 
The second voltage forms a second write current for { TAIL ~ a second duration } through the resistive sense memory cell in { HEAD ~ a second direction }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD