scripts vs. source codes

[Texas2Step]

What's the main difference between a source code and a script? Which is the more complex of the two?

[suwunk]

"Scripts" are distinct from the core code of the application, as they are usually written in a different language and are often created or at least modified by the end-user. Scripts are often interpreted from source code or bytecode, whereas the application is typically first compiled to native machine code.
Scripting language - Wikipedia, the free encyclopedia

I think source codes are more complex than scripts