Scoll box in Wordpress

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To create the content scroll box in Wordpress, insert the code as below:

<pre style="border: 1px dashed grey; margin: 0px; overflow: auto; width: 500px; height: 100px; text-align: left; background-color: white; color: black;" dir="ltr">
Line 1
Line 2
Line 3
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Line 5
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Line 8
</pre>