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A Matrix-ish display for Bash terminal
#!/bin/bash
#
# matrix: matrix-ish display for Bash terminal
# Author: Brett Terpstra 2012 <http://brettterpstra.com>
# Contributors: Lauri Ranta and Carl <http://blog.carlsensei.com/>
#
# A morning project. Could have been better, but I'm learning when to stop.
### Customization:
blue="\033[0;34m"
brightblue="\033[1;34m"
cyan="\033[0;36m"
brightcyan="\033[1;36m"
green="\033[0;32m"
brightgreen="\033[1;32m"
red="\033[0;31m"
brightred="\033[1;31m"
white="\033[1;37m"
black="\033[0;30m"
grey="\033[0;37m"
darkgrey="\033[1;30m"
# Choose the colors that will be used from the above list
# space-separated list
# e.g. `colors=($green $brightgreen $darkgrey $white)`
colors=($green $brightgreen)
### End customization
### Do not edit below this line
spacing=${1:-100} # the likelihood of a character being left in place
scroll=${2:-0} # 0 for static, positive integer determines scroll speed
screenlines=$(expr `tput lines` - 1 + $scroll)
screencols=$(expr `tput cols` / 2 - 1)
# chars=(a b c d e f g h i j k l m n o p q r s t u v w x y z A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9 ^)
# charset via Carl:
chars=(ア イ ウ エ オ カ キ ク ケ コ サ シ ス セ ソ タ チ ツ テ ト ナ ニ ヌ ネ ノ ハ ヒ フ ヘ ホ マ ミ ム メ モ ヤ ユ ヨ ラ リ ル レ ロ ワ ン)
count=${#chars[@]}
colorcount=${#colors[@]}
trap "tput sgr0; clear; exit" SIGTERM SIGINT
if [[ $1 =~ '-h' ]]; then
echo "Display a Matrix(ish) screen in the terminal"
echo "Usage: matrix [SPACING [SCROLL]]"
echo "Example: matrix 100 0"
exit 0
fi
clear
tput cup 0 0
while :
do for i in $(eval echo {1..$screenlines})
do for i in $(eval echo {1..$screencols})
do rand=$(($RANDOM%$spacing))
case $rand in
0)
printf "${colors[$RANDOM%$colorcount]}${chars[$RANDOM%$count]} "
;;
1)
printf " "
;;
*)
printf "\033[2C"
;;
esac
done
printf "\n"
# sleep .005
done
tput cup 0 0
done
@jonnyhtw
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jonnyhtw commented Sep 6, 2017

Love this! Thanks for sharing!

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