made the board for 4 connect

ConnectFour/src/Board.java

@@ -0,0 +1,42 @@
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+public class Board extends JPanel implements ActionListener {
+
+    private final int DELAY = 15;
+    private final int BOARD_W = 700;
+    private final int BOARD_H = 600;
+    private boolean isInitialized = false;
+
+    private Painter painter;
+    private Timer timer;
+
+    public Board(){
+        initBoard();
+        initGame();
+    }
+
+    private void initBoard(){
+        setPreferredSize(new Dimension(BOARD_W,BOARD_H));
+        setBackground(Color.LIGHT_GRAY);
+    }
+
+    private void initGame(){
+        painter = new Painter();
+        timer = new Timer(15, this);
+        timer.start();
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent e) {
+        repaint();
+    }
+
+    @Override
+    protected void paintComponent(Graphics g) {
+        super.paintComponent(g);
+        painter.paintBoard(g, BOARD_W, BOARD_H);
+    }
+}