modify the colorful bash for osx.

@@ -4,11 +4,11 @@
 #######################################
 # color echo.
 #######################################
-RED="\\e[31m"
-GREEN="\\e[32m"
-YELLOW="\\e[33m"
-BLACK="\\e[0m"
-POS="\\e[103G"
+RED="\\033[31m"
+GREEN="\\033[32m"
+YELLOW="\\033[33m"
+BLACK="\\033[0m"
+POS="\\033[103G"
 
 # if need to log to file, change the log path.
 if [[ ! $log ]]; then