<!doctype html>
<html>
<head>
<style>
.target {
    background-color: lime;
}
</style>
</head>
<body>
<div>
    <p class="target" id="target1">This line should be green.</p>
    <p class="target" id="target2">This line should be green.</p>
    <p class="target" id="target3">This line should be green.</p>
    <p class="target" id="target4">This line should be green.</p>
</div>
</body>
</html>