alias cn "cn1"
alias cn1 "name YOUR NICK1 HERE; alias cn cn2"
alias cn2 "name YOURNICK2 HERE; alias cn cn3"
alias cn3 "name YOUR NICK 3 HERE; alias cn cn4"
alias cn4 "name YOUR NICK 4 HERE; alias cn cn5"
alias cn5 "name YOUR NICK 5 HERE; alias cn cn1"
bind "ANY KEY" cn
The script tutorial is HERE