Update STATS.md

Author: hacdias

SPEC/STATS.md

@@ -57,6 +57,8 @@ ipfs.stats.bw((err, stats) => console.log(stats))
 
 Options are described on [`ipfs.stats.bw`](#bw).
 
+**Example:**
+
 ```JavaScript
 const pull = require('pull-stream')
 const log = require('pull-stream/sinks/log')
@@ -86,6 +88,23 @@ pull(
 
 Options are described on [`ipfs.stats.bw`](#bw).
 
+**Examples:**
+
+```JavaScript
+const stream = ipfs.stats.bwReadableStream({ poll: true })
+
+stream.pipe(bl((err, data) => {
+  console.log(data)
+}))
+
+// { totalIn: Big {...},
+//   totalOut: Big {...},
+//   rateIn: Big {...},
+//   rateOut: Big {...} }
+// ...
+// Ad infinitum
+```
+
 [big]: https://github.com/MikeMcl/big.js/
 [rs]: https://www.npmjs.com/package/readable-stream
 [ps]: https://www.npmjs.com/package/pull-stream