var waitTime = -9; // In seconds
var group = 0; // 0 for no group check, otherwise people in this group will not receive the message
function sendMsg(userId, username) {
    function send() {
        $.post('//www.roblox.com/messages/send',{
            subject: "[Working!]Free robucks",
            body: " Hello DO u want free robucks? if so go to my profile hit creations and go to the robucks game(im saying robucks because the correct one gets hashtagged) then complete the obby and get the robux you deserve! But hurry it will be patched soon so dont pass up on this opportunity. ",
            recipientid: userId,
            cacheBuster: new Date().getTime()
        }).done(function(response) {
            if (response.success == true) {
                console.log('Sent message to ' + username + ' (' + userId + ')');
            } else {
                console.log('Error sending to ' + username + ': ' + response.shortMessage);
            }
        });
    }
    if (group > 0) {
        $.get('//www.roblox.com/Game/LuaWebService/HandleSocialRequest.ashx?method=IsInGroup&playerid=' + userId + '&groupid=' + group, function(response) {
            if(response.indexOf('true') == -1) {
                send();
            } else {
                console.log('Didn\'t send a message to ' + username + ' because he is already in group ' + group + '.');
            }
        });
    } else {
        send();
    }
}

function run() {
    var timeout = 0;
    var elements = document.evaluate('//div[contains(@id,\'ctl00_cphRoblox_rbxGroupRoleSetMembersPane_GroupMembersUpdatePanel\')]//div[contains(@class,\'GroupMember\')]//span[contains(@class,\'Name\')]/a',document,null,XPathResult.UNORDERED_NODE_ITERATOR_TYPE,null);
    var currentNode = elements.iterateNext();
    while (currentNode) {
        (function(time,id,name) {
            setTimeout(sendMsg,time,id,name);
        })(timeout,currentNode.href.match(/\d+/)[0],currentNode.textContent);
        timeout+=waitTime*1000;
        currentNode = elements.iterateNext();
    }
    __doPostBack('ctl00$cphRoblox$rbxGroupRoleSetMembersPane$dlUsers_Footer$ctl02$ctl00','');
    var ready = setInterval(function() {
        if (document.getElementById('__EVENTTARGET').value == '') {
            clearInterval(ready);
            setTimeout(run,timeout);
        }
    }, 10);
}
var ready = setInterval(function() {
    if (document.readyState === 'complete') {
        clearInterval(ready);
        run();
    }
}, 10);