Attempted to make duplicate

main.cpp

@@ -249,10 +249,16 @@ void GUDButtonListener::onButton1MouseClick(BaseButtonInstance* button)
 		AudioPlayer::playSound(dingSound);
 		if(button->name == "Duplicate")
 		{
-
+			std::vector<Instance*> newinst;
+			for(size_t i = 0; i < selectedInstances.size(); i++)
+			{
+				Instance* inst = selectedInstances.at(i)->clone();
+				newinst.push_back(inst);
+				inst->setParent(selectedInstances.at(i)->getParent());
+			}
+			selectedInstances = newinst;
 		}
 	}
-		
 }
 
 class RotateButtonListener : public ButtonListener {