シェル上の文字列に色をつける（ピクセル画像も作る）(ANSI color code) ref: http://qiita.com/nyango/items/15de9e9ebfd43b695439

DIR_COLORS

# Attribute codes:
# 00=none 01=bold 04=underscore 05=blink 07=reverse 08=concealed
# Text color codes:
# 30=black 31=red 32=green 33=yellow 34=blue 35=magenta 36=cyan 37=white
# Background color codes:
# 40=black 41=red 42=green 43=yellow 44=blue 45=magenta 46=cyan 47=white

file0.txt

# Attribute codes:
# 00=none 01=bold 04=underscore 05=blink 07=reverse 08=concealed
# Text color codes:
# 30=black 31=red 32=green 33=yellow 34=blue 35=magenta 36=cyan 37=white
# Background color codes:
# 40=black 41=red 42=green 43=yellow 44=blue 45=magenta 46=cyan 47=white

file1.txt

AAABBCC
AABBBBD
AAADDDD

のような書き方から上のマリオの画像のようなものを生成