butto background

src/Tetris/GameGui.java

@@ -17,6 +17,7 @@ public class GameGui {
         JButton button2 = new JButton("Pause");
 
         panel.setLayout(new GridLayout(0,1));
+        panel.setBackground(Color.DARK_GRAY);
         panel.add(button1);
         panel.add(button2);
         /*