How to change color:

1. Input a ESC char:     If you use my joerc, Press F10 and '[' key
                         If you use vi, press Ctrl-V and ESC key (Input mode)
2. Type a '[' char
3. Type a color number as the list below
4. Type a 'm' char
5. Type ^[[m to restore to normal text color.   (^[ is ESC char)
   (請務必使用 ^[[m 還原顏色，而不是用黑色背景，很多人背景不是黑色的)

      Foreground
[30m 30 [m  [31m 31 [m  [32m 32 [m  [33m 33 [m  [34m 34 [m  [35m 35 [m  [36m 36 [m  [37m 37 [m

      [7mBackground[m
[40m 40 [m  [41m 41 [m  [42m 42 [m  [43m 43 [m  [44m 44 [m  [45m 45 [m  [46m 46 [m  [47m 47 [m

[1m
      Foreground
[30m 30   [31m 31   [32m 32   [33m 33   [34m 34   [35m 35   [36m 36   [37m 37 [m
