function addName (time, name){
return new Promise ((resolve, reject) => {
if(name){
setTimeout(()=>{
console.log(name)
resolve();
},time)
}else{
reject('No such name');
}
})
}
addName(2000, 'Joel')
.then(()=>addName(2000, 'Victoria'))
.then(()=>addName(2000, 'John'))
.then(()=>addName(2000, 'Doe'))
.then(()=>addName(2000, 'Sarah'))
.catch((err)=>console.log(err))