Added a system that will handle BGM. Created specific logic for sounds to loop like Petter wants.

include/Game/Systems/BackgroundMusicSystem.h

@@ -0,0 +1,21 @@
+#ifndef Systems_BackgroundMusicSystem_h__
+#define Systems_BackgroundMusicSystem_h__
+
+#include "../Engine/Core/System.h"
+#include "../Engine/Core/EventBroker.h"
+
+// Handles transitions between BGM's depending on the current state of the game.
+class BackgroundMusicSystem : public PureSystem
+{
+public:
+    BackgroundMusicSystem(SystemParams params);
+    ~BackgroundMusicSystem();
+    void UpdateComponent(EntityWrapper& entity, ComponentWrapper& cEmitter, double dt) override;
+
+private:
+    void mainMenuLoop();
+
+    const std::string menu = "Audio/crosscounter.wav";
+};
+
+#endif // ifndef