Help Customizing Size with Code

I'm hoping someone can tweak this code for me. As is, it seems to take up the entire page not allowing me to add additional pages or anything else. I need to somehow reduce the size of it so I can still add additional pages or text font to the remainder of the pages. 

Thank you in advance! 

https://www.jolijames.co/moonphase

You want to reduce this space or?

I want to reduce the entire block. When you look at the image, I currently can't put in any other pages or images into this page, I think because the image is too large?