Type your HTML here: (scripts and custom event handlers are not allowed) <p></p> <p> </p> <p>A smoke machine!</p>

Type any CSS you want here: (any properties allowed except expression, behavior and @import) /* here's pseudoclass-empty in action */ p:empty { border-color:#f00; } p { border:2px solid #00f; min-height:1em; }

Show me!