var delayInMilliseconds = 1000; //1 second
setTimeout(function() {
//your code to be executed after 1 second
}, delayInMilliseconds);
//single event i.e. alarm, time in milliseconds
var timeout = setTimeout(function(){yourFunction()},10000);
//repeated events, gap in milliseconds
var interval = setInterval(function(){yourFunction()},1000);// this example takes 2 seconds to run
const start = Date.now();
// After a certain amount of time, run this to see how much time passed.
const milliseconds = Date.now() - start;
console.log('Seconds passed = ' + millis / 1000);
// Seconds passed = *Time passed*