diff --git a/SwiftyFox.playground/Contents.swift b/SwiftyFox.playground/Contents.swift
index c8f4019..0017f4a 100644
--- a/SwiftyFox.playground/Contents.swift
+++ b/SwiftyFox.playground/Contents.swift
@@ -26,3 +26,14 @@ func calcStats(scores: [Int]) -> (min: Int, max: Int, sum: Int) {
 
 let stats = calcStats(scores: [5, 3, 100, 3, 9])
 let sum = stats.sum // 120
+
+class Shape {
+    var numberOfSides = 0
+    func simpleDescription() -> String {
+        return "A shape with \(numberOfSides) sides."
+    }
+}
+
+var shape = Shape()
+shape.numberOfSides = 7
+var shapeDesc = shape.simpleDescription()