script to mimic the cusor movement on a terminer or shell

#!/usr/local/bin/perl -w

    
# I have a program with a several 
# screens of menus, which
# needs me to move the cursor to 
# make choice, then hit the
# control plus n key to move 
# to next screen. I tried to use 
# this script to automate
# the process, but it failed.
# What is the problem here?

 $down ="\c[[B";
 $controlN = "\cN";
 $program_with_menu = "lrp";

  open(INPUT, "| $program_with_menu");
  #open(INPUT, "| $program_with_menu > /dev/null");

  print INPUT $controlN;        
  print INPUT $controlN; 
  print INPUT $down; 
  print INPUT $down; 
  print INPUT $down; 
  print INPUT $controlN;
  print INPUT $controlN;
  print INPUT $controlN;
  print INPUT $down; 
  print INPUT $controlN;

  print INPUT "\cZ";

  close(INPUT);



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