anchor.diff:  
   # send a sequence item
   seq_item_create vip_tr tr
  -seq_item_rand tr
   seq_item_set_fields tr chr='hff
   seqr_execute_item env.vip.sqr tr
   
  
positive.code: # start a new sequence
  seq_create vip_my01_seq my01_seq
  seq_rand my01_seq
  
  run 20000ns
  
  seq_start -priority 200 -new_thread 1 my01_seq env.vip.sqr
  
  run 20000ns
  
negative.code: wr_regfld regmodel.TxStatus.TxEn 0
  rd_regfld regmodel.TxStatus.TxEn
  
  #rewind
  
  # continue to demo sequence commands
  continue
  