Setup Panel with label nr 6

src/main/java/src/MainFrame.java

@@ -58,6 +58,8 @@ public class MainFrame extends JFrame {
         JPanel jPanel5 = setupNums("5");
         boxPanel.add(jPanel5);
 
+        JPanel jPanel6 = setupNums("6");
+        boxPanel.add(jPanel6);
 
         JButton back = new JButton();
         back.setVisible(true);