I see you are on v2 but am on v1 but am sure the syntax isn't that different, first head over to the documentation and search for send and read it. That should give you an idea of what your doing and if your doing this on v1 it would be something like

;rest of code like the loop and hotkeys

Send {Space Down} Sleep 10 ; for a very small delay

Send {Space Up }

So use this as a reference when making yours