如果语句不起作用，请使用变量对CC动作脚本3-函数进行动画处理

Question

我是一名正在学习的学生，我知道成千上万的问题，关于陈述是否已经得到答复，但我找不到与我能理解的场景有关的问题。我试图以我所知道的所有方式来操纵此代码，但无法弄清楚为什么它不起作用。我正在使用Animate CC actionscript3.0，并正在为幼儿园的孩子创建一个交互式测验。此功能是测验的最后一帧，显示最终分数，并带有一条说明该分数是否合格的语句。但是，if语句不起作用。有人可以告诉我我做错了什么吗，或者我的简单代码是否有可能告诉我。

这是分数开始的第一帧-

import flash.events.KeyboardEvent;

stop();

var rightAnswer = "cow";
var blankAnswer = " ";
var points:Number = 0;
txt_answer.text = "";
txt_result.text = "";


btn_submit1.addEventListener(MouseEvent.CLICK, submitAnswer);

function submitAnswer(event):void {
if (txt_answer.text.toLowerCase() == rightAnswer ) {
    txt_result.text = "You Rock!"; 
    points = points + 10;

} else {
    txt_result.text = "Oops!"; 
    points = points - 5;
}

if (txt_answer.text.toLowerCase() == blankAnswer ) {
    txt_result.text = "Oops!"; 
    points = points - 5;
}   

txt_score.text = points.toString();
btn_submit1.visible = false; 
stage.focus = txt_result;
txt_answer.type = TextFieldType.DYNAMIC; 
}

这是从最后一帧开始的

var finalScore =  txt_score.text = points.toString();


var zoo = txt_summary.text = "Wow " + userName + " , you did an 
awesome job! Your final score is " + finalScore + " . As a 
reward, we would like to invite you to our petting zoo to see all 
of the animals you named in the quiz and some you may have 
missed!";

var retry = txt_summary.text = "Good try " + userName + " , your 
final score is " + finalScore + ". Let's practice a little more. 
You still have a chance to come to our petting zoo if you retry 
the quiz and improve your score. Give it a try, you can do it!";

function scoreCal() {
if (finalScore > 70) {
    zoo;
    btn_zoo.visible = true;
}

else {
    retry;
    btn_zoo.visible = false;
};  
}