执行等待javascript

Question

我希望颜色按顺序闪烁，因此第二次闪光将在第一次闪光结束后不在中间。 函数setTimeOut（）只是重新安排执行，因此脚本不等待setTimeOut函数。

var array=["Gre","Red","Yel","Blu"];
var action=[];
var response=[];

function clickGreen(){
$("#buttonGre").addClass("activated");
  setTimeout(function() {$("#buttonGre").removeClass("activated");}, 250);
  }
function clickRed(){
$("#buttonRed").addClass("activated");
  setTimeout(function() {$("#buttonRed").removeClass("activated");}, 250);
  }

function clickYellow(){
$("#buttonYel").addClass("activated");
setTimeout(function() {$("#buttonYel").removeClass("activated");}, 250);
  }

function clickBlue(){
$("#buttonBlu").addClass("activated");
  setTimeout(function() {$("#buttonBlu").removeClass("activated");}, 250);
  }

function buildAction(){
  var step=Math.floor((Math.random() * 4));
  action.push(array[step]);
  for(var i=0;i<action.length;i++){
    if(action[i]=="Gre"){
      clickGreen();
    }
    if(action[i]=="Red"){
      clickRed();
    }
    if(action[i]=="Yel"){
      clickYellow();
    }
    if(action[i]=="Blu"){
      clickBlue();
    }
  }
}

.gameContainer {
	position:relative;
	width:440px;
	height:440px;
	margin:0 auto;
  margin-top: 50px;
  border: solid 1px black;
  border-radius: 50%;
  background-color: grey;
}

.fourButton {
	position:absolute;
	width:190px;
	height:190px;
  margin: 20px;
  pointer-events: none;
}

#buttonGre {
	top:0;
	left:0;
	background-color:green;
	border-radius:100% 0 0 0;
}
#buttonRed {
	top:0;
	right:0;
	background-color:red;
	border-radius:0 100% 0 0 ;
}
#buttonYel {
	bottom:0;
	left:0;
	background-color:yellow;
	border-radius:0 0 0 100%;
}
#buttonBlu {
	bottom:0;
	right:0;
	background-color:blue;
	border-radius:0 0 100% 0 ;
}
#center {
  position:absolute;
  background-color:white;
  border: 20px solid grey;
	width:200px;
	height:200px;
	top:100px;
	left:100px;
	border-radius:50%;
}

.activated {
  opacity: .5;
}

#labl{
  margin-left: 50px; 
  margin-top:40px; 
  font-family: Arial; 
  font-size:200%
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="gameContainer ">
  <div id="buttonGre" class="fourButton"></div>
  <div id="buttonRed" class="fourButton"></div>
  <div id="buttonYel" class="fourButton"></div>
  <div id="buttonBlu" class="fourButton"></div>
  <div id="center">
    <div id="labl"><strong>SIMON</strong></div>
    <center>
      </br>
     <button id="count">--</button>
    <button id="start" onclick="buildAction()">start</button>
    <button id="strict">strict</button></br>
    </br>
    <button id="restart">Restart</button></center>
  </div>
</div>