How does this cmd wreg thing work?

i did a onload.cfg which was executed with 'alias on_enter exec onload.cfg'

cmd wreg a 852
alias +lg "cmd a; +attack"
alias -lg "-attack; cmd d"
cmd wreg b 732
alias +rl "cmd b; +attack"
alias -rl "-attack; cmd d"
cmd wreg c 6532
alias +gl "cmd c; +attack"
alias -gl "-attack; cmd d"
cmd wreg d 2
alias +sg "cmd d ; +attack"
alias -sg "-attack"
cmd wreg e 3
alias +ssg "cmd e; +attack"
alias -ssg "-attack; cmd d"
cmd wreg f 5
alias +sng "cmd f; +attack"
alias -sng "-attack; cmd d"

But it doesn't work as expected, anyone have a clue?