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diff --git a/src/content/chapter5_advance_features/lesson01_use_sugar/code.gleam b/src/content/chapter5_advance_features/lesson01_use_sugar/code.gleam
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+import gleam/io
+import gleam/result
+
+pub fn main() {
+  let x = {
+    use username <- result.try(get_usename())
+    use password <- result.try(get_password())
+    use greeting <- result.map(log_in(username, password))
+    greeting <> ", " <> username
+  }
+
+  case x {
+    Ok(greeting) -> io.println(greeting)
+    Error(error) -> io.println_error(error)
+  }
+}
+
+// Here are some pretend functions for this example:
+
+fn get_usename() {
+  Ok("alice")
+}
+
+fn get_password() {
+  Ok("hunter2")
+}
+
+fn log_in(_username: String, _password: String) {
+  Ok("Welcome")
+}