Update proxy description with simple example

structural/proxy.md

@@ -6,8 +6,38 @@ The [proxy pattern](https://en.wikipedia.org/wiki/Proxy_pattern) provides an obj
 
 The proxy could interface to anything: a network connection, a large object in memory, a file, or some other resource that is expensive or impossible to duplicate.
 
+Short idea of implementation:
 ```go
-    // Some short examples
+    type IObject interface {
+        ObjDo(action string)
+    }
+
+    type Object struct {
+        action string
+    }
+
+    func (obj *Object) ObjDo(action string) {
+        // Action handler
+        fmt.Printf("I do, %s", action)
+    }
+
+    type ProxyObject struct {
+        object *Object
+    }
+
+    func (p *ProxyObject) ObjDo(action string) {
+        if p.object == nil {
+            p.object = new(Object)
+        }
+        if action == "Run" {
+            p.object.ObjDo(action)
+        }
+    }
+
+    func main() {
+        newObj := new(ProxyObject)
+        newObj.ObjDo("Run") // Prints: I can, Run
+    }
 ```
 
 ## Usage