How to add codebox in Blogger post

 This is from https://www.techyleaf.in/add-code-box-in-blogger-post/ .

Step 1: copy and paste the following into the HTML of the post. 

<pre style="background: rgb(238, 238, 238); border-bottom-color: initial; border-bottom-style: initial; border-image: initial; border-left-color: initial; border-left-style: initial; border-radius: 10px; border-right-color: initial; border-right-style: initial; border-top-color: rgb(221, 221, 221); border-top-style: solid; border-width: 5px 0px 0px; color: #444444; font-family: &quot;Courier New&quot;, Courier, monospace; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin-bottom: 1.5em; margin-top: 0px; overflow-wrap: normal; overflow: auto; padding: 12px; vertical-align: baseline;"><span style="font-size: 13px;">Replace the text with codes</span></pre><p>Start write the next paragraph here </p>

Step 2: Copy/Edit in the Compose View of the post 

This adds codebox. However, it is rather cumbersome. Better method?