<body>
        <div>
            <h1>This is a Test</h1>
            <p class="switch">Press <span tabindex="0">This!</span></p>
            <p class="change">This should Change.</p>
        </div>
</body>
.switch span    { background: #ff0;}
.switch span:focus ~ .change { background: #f00; color: #fff; }
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