css and javascript

Question

Can you please help me to design the codepen code 

 

https://codepen.io/zeinab92/pen/JYKyBx

 

in this page login window comes first I need that plus icon comes first then as normal ...

 

HTML Code 

 

<header>
<div id="darkBack"></div>
<div id="popUp">
<div id="close" class="close"><i class="fa fa-times"></i></div>
<div id="new"><span>NEW!</span></div>
<h2>I'm a notification popup that isn't too distracting or in your face. Scroll down or close me and I will go away. You'll still be able to open me later on don't worry.</h2>
<br>
<a href="#" target="_blank" class="button">Visit Page</a>
</div>
<div id="plus"><span>NEW<br>  <i class="fa fa-plus"></i></span></div>
</header>
<div id="body"></div>

CSS Code

  

* {
margin: 0;
font-family: 'Source Sans Pro', sans-serif;
}
a {
text-decoration: none;
}
header {
background: url(http://cdn.magdeleine.co/wp-content/uploads/2015/08/9524476479_ef867c36a4_o-1400x935.jpg);
background-size: cover;
background-position: center;
height: 100vh;
width: 100%;
}
#darkBack {
width: 100%;
height: 100vh;
background: rgba(76, 56, 75, .15);
}
#popUp {
position: fixed;
max-width: 350px;
height: 225px;
background: rgba(236, 240, 241, 1);
border: 7px solid #fff;
bottom: 0;
margin-left: 0;
-webkit-transition: all 1s ease;
-moz-transition: all 1s ease;
-o-transition: all 1s ease;
transition: all 1s ease;
}
#new span {
background: #fff;
position: absolute;
color: #1c8dc4;
padding: 4px 10px;
font-size: 16px;
font-weight: 600;
letter-spacing: 1px;
margin-top: -5px;
}
#popUp .close {
color: #464646;
right: 8px;
top: 0px;
position: absolute;
font-size: 20px;
cursor: pointer;
}
#popUp h2 {
font-size: 17px;
color: #464646;
line-height: 24px;
font-weight: 400;
text-align: center;
margin-top: 40px;
padding: 0 20px;
}
#body {
height: 1200px;
background: #eee;
}
a.button {
margin: 0 auto;
text-align: center;
right: 0;
left: 0;
position: absolute;
width: 120px;
font-size: 15px;
color: #fff;
border-bottom: 2px solid #18729f;
background: #1c8dc4;
border-radius: 4px;
padding: 8px 0;
}
#plus {
position: fixed;
color: #fff;
bottom: 15%;
font-size: 15px;
margin-left: -425px;
-webkit-transition: all 1.25s ease;
-moz-transition: all 1.25s ease;
-o-transition: all 1.25s ease;
transition: all 1.25s ease;
cursor: pointer;
text-align: left;
letter-spacing: 1px;
}
#plus span {
position: absolute;
margin-top: 38px;
left: 4px;
}
#plus::after {
content: '';
display: block;
display: relative;
border-top: 55px solid transparent;
border-bottom: 55px solid transparent;
border-left: 55px solid #1c8dc4;
}
@media all and (max-width: 900px) {
#popUp {
margin-left: -425px;
}
#plus {
margin-left: 0px;
}
}

JavaScript Code 

$(document).scroll(function() {
var scroll = $(this).scrollTop();
if (scroll >= 150) {
$("#popUp").css("margin-left", "-425px");
$("#plus").css("margin-left", "0px");
}
});
$("#plus").click(function() {
$("#popUp").css("margin-left", "0px");
$("#plus").css("margin-left", "-425px");
});
$("#close").click(function() {
$("#popUp").css("margin-left", "-425px");
$("#plus").css("margin-left", "0px");
});

https://codepen.io/zeinab92/pen/JYKyBx