diff --git a/core/include/mind.h b/core/include/mind.h
new file mode 100644
index 0000000..9a264be
--- /dev/null
+++ b/core/include/mind.h
@@ -0,0 +1,23 @@
+#ifndef _MIND_H
+#define _MIND_H
+
+#include <thought.h>
+
+class Mind
+{
+public:
+	void Mind::wander(void)
+	{
+		for (;;)
+		{
+			Thought		idleThought(subconscious);
+
+			idleThought.walk(mind);
+		}
+	}
+
+public:
+	Subconscious	subconscious;
+};
+
+#endif
diff --git a/core/include/nonNeutralQualia.h b/core/include/nonNeutralQualia.h
new file mode 100644
index 0000000..be3e81a
--- /dev/null
+++ b/core/include/nonNeutralQualia.h
@@ -0,0 +1,20 @@
+#ifndef _NON_NEUTRAL_QUALIA_H
+#define _NON_NEUTRAL_QUALIA_H
+
+#include <quale.h>
+
+class PleasantQuale
+: public NonNeutralQuale
+{
+public:
+	virtual void eventInd(void);
+};
+
+class PainfulQuale
+: public NonNeutralQuale
+{
+public:
+	virtual void eventInd(void);
+};
+
+#endif
diff --git a/core/include/quale.h b/core/include/quale.h
index ef21382..d965f8a 100644
--- a/core/include/quale.h
+++ b/core/include/quale.h
@@ -1,9 +1,11 @@
 #ifndef _QUALE_H
 #define _QUALE_H
 
+#include <cstdint>
+
 class Quale
 {
-	int intensity;
+public:
 	enum class Type
 	{
 		NEUTRAL,
@@ -15,6 +17,20 @@ class Quale
 		PAINFUL,
 		PLEASURABLE
 	} type;
+
+	int32_t intensity;
+};
+
+class NeutralQuale
+: public Quale
+{
+};
+
+class NonNeutralQuale
+: public Quale
+{
+public:
+	virtual void eventInd(void);
 };
 
 #endif
diff --git a/core/include/scene.h b/core/include/scene.h
new file mode 100644
index 0000000..6691dc8
--- /dev/null
+++ b/core/include/scene.h
@@ -0,0 +1,9 @@
+#ifndef _SCENE_H
+#define _SCENE_H
+
+class Scene
+{
+};
+
+#endif
+
diff --git a/core/include/subconscious.h b/core/include/subconscious.h
new file mode 100644
index 0000000..5b2f50a
--- /dev/null
+++ b/core/include/subconscious.h
@@ -0,0 +1,8 @@
+#ifndef _SUBCONSCIOUS_H
+#define _SUBCONSCIOUS_H
+
+class Subconscious
+{
+};
+
+#endif
diff --git a/core/include/thought.h b/core/include/thought.h
new file mode 100644
index 0000000..b11a99b
--- /dev/null
+++ b/core/include/thought.h
@@ -0,0 +1,12 @@
+#ifndef _THOUGHT_H
+#define _THOUGHT_H
+
+#include <scene.h>
+
+class Thought
+{
+public:
+	Scene	scene;
+};
+
+#endif
diff --git a/core/main.cpp b/core/main.cpp
new file mode 100644
index 0000000..65591d9
--- /dev/null
+++ b/core/main.cpp
@@ -0,0 +1,11 @@
+#include <mind.h>
+
+int main(int argc, char **argv)
+{
+	for (;;)
+	{
+		mind.wander();
+	}
+
+	return 0;
+}