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<
