added simple bash script to show available colors

bash_colors.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+#
+#   This file echoes a bunch of color codes to the 
+#   terminal to demonstrate what's available.  Each 
+#   line is the color code of one forground color,
+#   out of 17 (default + 16 escapes), followed by a 
+#   test use of that color on all nine background 
+#   colors (default + 8 escapes).
+#
+
+T='gYw'   # The test text
+
+echo -e "\n                 40m     41m     42m     43m\
+     44m     45m     46m     47m";
+
+for FGs in '    m' '   1m' '  30m' '1;30m' '  31m' '1;31m' '  32m' \
+           '1;32m' '  33m' '1;33m' '  34m' '1;34m' '  35m' '1;35m' \
+           '  36m' '1;36m' '  37m' '1;37m';
+  do FG=${FGs// /}
+  echo -en " $FGs \033[$FG  $T  "
+  for BG in 40m 41m 42m 43m 44m 45m 46m 47m;
+    do echo -en "$EINS \033[$FG\033[$BG  $T  \033[0m";
+  done
+  echo;
+done
+echo
+