var time = 2000; //time in milliseconds
setInterval(function(){

var y = document.getElementsByTagName('textarea');
for (var z = 0;z<y.length;z++){
y[z].value = "MESSAGE HERE" + "\n" + Math.random();
y[z].focus();
setTimeout(function(){

}, 1000);
}
var x = document.getElementsByTagName('button');
for (var i = 0;i<x.length;i++){
if(x[i].innerHTML.indexOf("Chat") != -1){
if (x[i].innerHTML.indexOf('Hide') == -1){
x[i].click();
x[i].focus();
}
} else {
//alert('nope');
}
}

},  time);