Bash:-3次错误输入退出脚本

Limit_Condition()
{
  let count++
  if [[ ${count} ==  ]];then
    echo "超过3次机会，自动关停脚本"
    exit
  fi

Comfirm()
{
  count=
  while true;do
    read -t  -p "${1}" ENTER
      case "${ENTER}" in
        y|Y)
            break
            ;;
        n|N)
            echo "${2}"
            ${}
            ;;
        "")
            echo "输入超时，请重新输入..."
            Limit_Condition
            :
            ;;
        *)
            echo "输入错误,请重新输入..."
            Limit_Condition
            :
            ;;
      esac
  done
}