"Code section" instead of code block?

I am trying to display custom code in a way that allows to utilize the full width of the screen. As of now I have only been able to do use code blocks within a particular section to display this code - this however limits the maximum width with which I can display the custom code content. 

Is there a way to use custom code directly applied to a section? A "code section" instead of a "code block", if you will.