Copy from http://bruxy.regnet.cz/web/linux/EN/matrix-sh/, just change random chars to 啊.

matriahix.sh

#!/bin/bash
echo -e "\033[2J\033[?25l"; R=`tput lines` C=`tput cols`;: $[R--] ; while true
do ( e=echo\ -e s=sleep j=$[RANDOM%C] d=$[RANDOM%R];for i in `eval $e {1..$R}`;
do c=`printf '啊'`  # fork from http://bruxy.regnet.cz/web/linux/EN/matrix-sh/ #
$e "\033[$[i-1];${j}H\033[32m$c\033[$i;${j}H\033[37m"$c; $s 0.1;if [ $i -ge $d ]
then $e "\033[$[i-d];${j}H ";fi;done;for i in `eval $e {$[i-d]..$R}`; #[mat!rix]
do echo -e "\033[$i;${j}f ";$s 0.1;done)& sleep 0.05;done #(c) 2011 -- [ BruXy ]

啊啊啊啊啊啊