Loading two images into custom script in EO Browser

I am struggling to load 2 images in my custom script for change analysis. On EO Browser, It seems only one image is loaded at a time, like:

let ndvi = (B08 - B04) / (B08 + B04);

How can I load two images at a time?

I am not sure, what you would like to do.
If you are referring to comparison of two NDVI values on two different dates, I suggest you look at

This one is for burned area, but you could do the same with NDVI