以下是一份基于HTML5 Canvas实现的跨年烟花源代码：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>html5夜景放烟花绽放动画效果</title>
<style type="text/css">
body {
margin: 0px;
padding: 0px;
background-color: #000;
}
.shape {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
font-size: 48px;
color: #FFF;
font-family: Arial, sans-serif;
display: none;
}
</style>
</head>
<body>
<canvas id="canvas" width="800" height="600"></canvas>
<div class="shape">财源广进</div>
<script type="text/javascript">
var<
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