1var intervalID = setInterval(alert, 1000); // Will alert every second.
2// clearInterval(intervalID); // Will clear the timer.
3
4setTimeout(alert, 1000); // Will alert once, after a second.
5setInterval(function(){ 
6	console.log("Oooo Yeaaa!");
7}, 2000);//run this thang every 2 seconds

1setTimeout() //executes the code after x seconds.
2.setInterval() //executes the code **every** x seconds.

1/*The difference between setTimeout() and setInterval() is that
2setTimeout() only executes code once, but setInterval() executes
3the code each amount of time you input. For example,*/
4
5/*In this function, it executes a function after 1000 milliseconds, or 1
6second.*/
7function oneSecond(){
8  setTimeout(1000, function(){
9    console.log('That was 1 second.')
10  })
11}
12
13/*In this function, it executes a function every 1 second*/
14function stopWatch(){
15  var count = 0;
16  setInterval(1000, function(){
17    console.log(count + " Seconds passed")
18  })
19}

1var intervalID = setInterval(alert, 1000); // Will alert every second.
2// clearInterval(intervalID); // Will clear the timer.
3
4setTimeout(alert, 1000); // Will alert once, after a second.