JS code help

Question

The following code started from a tutorial with just 'box'. I added 'box2' and it worked fine. I can't figure out why 'box3' wont show?

https://code.sololearn.com/WBAoaw1i701h/?ref=app

Answer 1

lines 18,19 on css. delete one '}'

Answer 2

Thanks mate, all good now. Was focusing on JS. Copy/Paste error on my part.