<p>テキスト</p>
<p>テキスト</p>
<p>テキスト</p>
p {
width:70px;
background-color:red;
transition-duration: 2s;
transition-property:width;
}
p:hover {
width:200px;
background-color:blue;
}
This Pen doesn't use any external CSS resources.
This Pen doesn't use any external JavaScript resources.