gistfile1.txt

matrix () {
	lines=$(tput lines)
	cols=$(tput cols)
	awkscript='
        {
        letters="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789@#$%^&*()"

        lines=$1
        random_col=$3

        c=$4
        letter=substr(letters,c,1)

        cols[random_col]=0;

        for (col in cols) {
        line=cols[col];
        cols[col]=cols[col]+1;

        printf "\033[%s;%sH\033[2;32m%s", line, col, letter;
        printf "\033[%s;%sH\033[1;37m%s\033[0;0H", cols[col], col, letter;

        if (cols[col] >= lines) {
                cols[col]=0;
        }
        }
        }
        '
	echo -e "\e[1;40m"
	clear
	if [ -t 0 ]
	then
		stty -echo -icanon -icrnl time 0 min 0
	fi
	keypress=''
	while [ "x$keypress" = "x" ]
	do
		echo $lines $cols $(( $RANDOM % $cols)) $(( $RANDOM % 72 ))
		sleep 0.03
		keypress="`cat -v`"
	done | awk "$awkscript"
	if [ -t 0 ]
	then
		stty sane
	fi
	clear
}