Something like this?
Code:
<div style="position: relative; width: 500px; height: 400px; background: black; margin: auto">
<div style="position: absolute; left: 2%; top: 2%; right: 2%; bottom: 2%; border: 1px solid black; border-radius: 15px; background: white; padding: 10px">
text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text
</div>
</div>
Or this?
Code:
<div style="position: absolute; left: 10%; top: 10%; right: 10%; bottom: 10%; background: black">
<div style="position: absolute; left: 2%; top: 4%; right: 2%; bottom: 4%; border: 1px solid black; border-radius: 15px; background: white; padding: 10px">
text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text
</div>
</div>
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