upstream backendservers{
   least_conn;
   server 2.2.2.2;
   server 3.3.3.3;
}
server {
   listen 80;
   server_name mydomain-at-godaddy.com *.mydomain-at-godaddy.com;

   location / {
       proxy_pass http://backendservers;
       #proxy_redirect off;
    }
 }

Browser --> Enter http://1.1.1.1 ---> http://2.2.2.2
Browser --> Enter http://1.1.1.1 ---> http://3.3.3.3