Live
x
1
<h1>Hello world!</h1>2
<h2>Oto moja pierwsza strona internetowa.</h2>3
External CSS
This Pen doesn't use any external CSS resources.
External JavaScript
This Pen doesn't use any external JavaScript resources.
<h1>Hello world!</h1><h2>Oto moja pierwsza strona internetowa.</h2>This Pen doesn't use any external CSS resources.
This Pen doesn't use any external JavaScript resources.