--- a/src/SimulatorWindow.h	Thu Mar 14 20:39:34 2019 +0100
+++ b/src/SimulatorWindow.h	Thu Mar 14 21:37:43 2019 +0100
@@ -22,6 +22,7 @@
 #include <QCheckBox>
 #include <QSlider>
 #include <QPushButton>
+#include <QTimer>
 
 #include "MotionEvent.h"
 #include "ButtonEvent.h"
@@ -40,7 +41,9 @@
 	std::vector<QSlider*> motions;
 	std::vector<QSlider*> rotations;
 	QPushButton* centerButton;
+	QCheckBox* periodicButton;
 	QSlider* createSlider(QWidget* parent);
+	QTimer* timer;
 
 private slots:
 	void centerAll();