README.md in lps-0.2.0 vs README.md in lps-0.2.1

@@ -48,9 +48,20 @@
 
 ```ruby
 LPS.freq(10).loop { break if rand(10) == 0 }
 ```
 
+Changing loop frequency
+-----------------------
+
+```ruby
+i = 0
+LPS.while { i < 100 }.loop do |lps|
+  print '.'
+  lps.freq = i += 1
+end
+```
+
 Falling behind
 --------------
 
 With LPS, the given loop block is run synchronously,
 which means that if the block execution takes longer than the interval for the given frequency,