diff --git a/README.md b/README.md
index dd13a70..18b6203 100644
--- a/README.md
+++ b/README.md
@@ -10,24 +10,30 @@ In meaning, S stands for Speed, Secure, Simple and Small.
 
 ## [Example code](/example.ss)
 ```
-// This program to solve FizzBuzz;
+// This program is to solve FizzBuzz;
+
+fn fizzbuzz(i) {
+    if i % 15 == 0 {
+        return "FizzBuzz";
+    };
+    if i % 5 == 0 {
+        return "Buzz";
+    };
+    if i % 3 == 0 {
+        return "Fizz";
+    };
+    return str(i);
+};
+
+fn add_text(source, text) {
+    return source + text + " "
+};
+
 var i <- 0;
 var result <- "";
 while i < 100 {
     var i <- i + 1;
-    if i % 15 == 0 {
-        var result <- result + "FizzBuzz ";
-    }; if !(i % 15 == 0) {
-        if i % 5 == 0 {
-            var result <- result + "Buzz ";
-        }; if !(i % 5 == 0) {
-            if i % 3 == 0 {
-                var result <- result + "Fizz ";
-            }; if !(i % 3 == 0) {
-                var result <- result + f"{i} ";
-            };
-        };
-    };
+    var result <- add_text(result, fizzbuzz(i));
 };
 print result;
 ```