jQuery:deferred an example of promise chained deferred with pipe and done. Coffeescript and javascript

pipe.coffee

promise= (fn) -> df= $.Deferred(fn).promise() 

df=promise (df) -> setTimeout( (-> df.resolve(1000)), 1 )
df.pipe (x) -> 
  promise (df) -> setTimeout( (-> df.resolve(x+1000)), 2 )
.pipe (x) -> 
  promise (df) -> setTimeout( (-> df.resolve(x+1000)), 2 )
.pipe (x) -> 
  promise (df) -> setTimeout( (-> df.resolve(x+1000)), 2 )
.pipe (x) -> 
  console.log x
.done (x) -> console.log "ufo"

pipe.js

var df, promise;
promise = function(fn) {
  var df;
  return df = $.Deferred(fn).promise();
};
df = promise(function(df) {
  return setTimeout((function() {
    return df.resolve(1000);
  }), 1);
});
df.pipe(function(x) {
  return promise(function(df) {
    return setTimeout((function() {
      return df.resolve(x + 1000);
    }), 2);
  });
}).pipe(function(x) {
  return promise(function(df) {
    return setTimeout((function() {
      return df.resolve(x + 1000);
    }), 2);
  });
}).pipe(function(x) {
  return promise(function(df) {
    return setTimeout((function() {
      return df.resolve(x + 1000);
    }), 2);
  });
}).pipe(function(x) {
  return console.log(x);
}).done(function(x) {
  return console.log("ufo");
});