Took me a while, but now (I think) I understand it. Good you gave the example with the code, otherwise I wouldn’t have had a chance 
One question: what are the “{}” good for? I noticed it doesn’t work without them, but what’s their function?
And maybe one (hopefully last) thing I can’t get done which would make things look nicer: I how can I align nested objects? Here’s (Alignment in nested objects) the entire description but nobody could help me so far …