//just store your accs in the string array below
//and remember to separate the ign, user and pass with a colon
//the format is "ingamename:loginusername:loginpassword"
private String[] accounts = new String[]{"ign1:username1:pass", "ign2:username2:pass", "ign3:username3:pass"};
private int cycleMinutes = 30;
private int accIndex;
private long timer = System.currentTimeMillis();

public void run() {

    String[] accInfo = accounts[accIndex].split();
    String ign = accInfo[0];
    String username = accInfo[1];
    String password = accInfo[2];

    //cycling accounts
    if (System.currentTimeMillis() - timer > cycleMinutes * 60000) {
        timer = System.currentTimeMillis();
        accIndex++;
        if (accIndex >= accounts.length) {
            accIndex = 0;
        }
    }

    //logging into and out of accounts
    if (Game.isLoggedin()) {
        RSPlayer myPlayer = Player.getRSPlayer();
        if (myPlayer != null && myPlayer.getName() != null) {
            if (myPlayer.getName().equalsIgnoreCase(ign)) {
                //run your script here
            } else {
                Login.logout();
            }
        }
    } else {
        Login.login(username, password);
    }
}