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+## Sending events from a worker thread
+
+This second example demonstrates how we can use events to communicate from the worker
+thread to the main thread.
+
+Like before, we create a thread and we define the fibonacci function:
+
+``` javascript
+var Threads = require('webworker-threads');
+var t = Threads.create();
+
+function fibo(n) {
+	return n > 1 ? fibo(n - 1) + fibo(n - 2) : 1;
+}
+```
+
+Instead of running a single fibonacci computation in the worker thread, we are going to execute a function
+that computes all fibonacci numbers and emits a `data` event for every number it generates.
+
+This function runs inside the worker thread so it does not see the `t` variable which belongs to the 
+main thread. But **webworker-threads** sets up a global `thread` variable that the worker thread can use to 
+send events to the main thread.
+
+Here is our fibonacci generator:
+
+``` javascript
+function generateFibos(max) {
+	for (var i = 1; i <= max; i++) {
+		thread.emit("data", i, fibo(i));
+	}
+}
+```
+
+Note: this is obviously a very inefficient algorithm to generate the sequence of fibonacci numbers.
+
+Inside the main thread, we set up an event listener for the `data` events emitted by the 
+worker thread:
+
+``` javascript
+t.on('data', function(n, result) {
+	console.log('fibo(' + n + ') = ' + result);
+})
+```
+
+Now, we are ready to go. We load the two functions into the worker thread
+
+``` javascript
+t.eval(fibo);
+t.eval(generateFibos);
+```
+
+And we run the generator with a callback that will execute when the generator returns from its loop:
+
+``` javascript
+t.eval("generateFibos(40)", function(err, result) {
+	if (err) throw err;
+	console.log("generator is done!");
+	t.destroy();
+});
+```
+
+### Output
+
+```
+fibo(1) = 1
+fibo(2) = 2
+fibo(3) = 3
+fibo(4) = 5
+...
+fibo(39) = 102334155
+fibo(40) = 165580141
+generator is done!
+```