#!/bin/bash
#description: test
function echo_color() {
  if [ $1 == "green" ]; then
	echo -e "\033[32;40m$2\033[0m"
  elif [ $1 == "red" ]; then
	echo -e "\033[31;40m$2\033[0m"
  fi
}

function echo_color2() {
    case $1 in
    green)
echo -e "\033[32;40m$2\033[0m";;
    red)
echo -e "\033[31;40m$2\033[0m";;
*)
echo "echo_color{green|red}] string"
esac
}
echo_color red "wodemin"
echo_color2 red "lvzilong"
echo_color2 green "zhangsanfeng"