diff --git a/engine/include/fishbone/types.h b/engine/include/fishbone/types.h
index 7daadc4..62a3039 100644
--- a/engine/include/fishbone/types.h
+++ b/engine/include/fishbone/types.h
@@ -27,6 +27,16 @@ namespace fishbone {
 		float y;
 		float z;
 	};
+
+	struct Quaternion {
+		struct fishbone::Quaternion operator+(struct fishbone::Quaternion q) const;
+		struct fishbone::Quaternion operator-(struct fishbone::Quaternion q) const;
+
+		float w;
+		float x;
+		float y;
+		float z;
+	};
 }; // namespace fishbone
 
 #endif
diff --git a/engine/src/client.cc b/engine/src/client.cc
index 8009e67..28d9822 100644
--- a/engine/src/client.cc
+++ b/engine/src/client.cc
@@ -38,8 +38,8 @@ float r = 0;
 bool fishbone::Client::step() {
 	this->renderer->prepare();
 
-	m->draw((struct fishbone::Vector3){0, 0, 0}, (struct fishbone::Vector3){0, r, 0});
-	r++;
+	m->draw((struct fishbone::Vector3){0, 0, 0}, (struct fishbone::Vector3){r, r, r});
+	r += 30.0 / 60;
 
 	this->window->swapBuffer();
 
diff --git a/engine/src/types.cc b/engine/src/types.cc
index 6239fc3..b445192 100644
--- a/engine/src/types.cc
+++ b/engine/src/types.cc
@@ -54,3 +54,11 @@ struct fishbone::Vector3 fishbone::Vector3::normalize() {
 
 	return {this->x * l, this->y * l, this->z * l};
 }
+
+struct fishbone::Quaternion fishbone::Quaternion::operator+(struct fishbone::Quaternion q) const {
+	return {this->w + q.w, this->x + q.x, this->y + q.y, this->z + q.z};
+}
+
+struct fishbone::Quaternion fishbone::Quaternion::operator-(struct fishbone::Quaternion q) const {
+	return {this->w - q.w, this->x - q.x, this->y - q.y, this->z - q.z};
+}