imacros firefox coder needed

i want a script that visits a website then change the IP and visit another website then change again and so on and so forth i cant find anything on this forum covering this topic some are old and not working so i want to hire someone who can do it for me.

found this topic from imacros forum "t=12440#p36761" you have to add that url at the end of the imacros forum url cause i cant link it here.. but completely confused as my proxy have username and password

thanks