Lauren Long laurenzlong

## index.html
<html>
<head>
<script src="https://www.gstatic.com/firebasejs/3.0.0/firebase.js"></script>
<title>ZeroToApp</title>
<style>
  #messages { width: 40em; border: 1px solid grey; min-height: 20em; }
  #messages img { max-width: 240px; max-height: 160px; display: block; }
  #header { position: fixed; top: 0; background-color: white; }
  .push { margin-bottom: 2em; }
  @keyframes yellow-fade { 0% {background: #f2f2b8;} 100% {background: none;} }
	<html>
	<head>
	<script src="https://www.gstatic.com/firebasejs/3.0.0/firebase.js"></script>
	<title>ZeroToApp</title>
	<style>
	#messages { width: 40em; border: 1px solid grey; min-height: 20em; }
	#messages img { max-width: 240px; max-height: 160px; display: block; }
	#header { position: fixed; top: 0; background-color: white; }
	.push { margin-bottom: 2em; }
	@keyframes yellow-fade { 0% {background: #f2f2b8;} 100% {background: none;} }