import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;

@SuppressWarnings("serial")
public class Applet2017a extends JApplet implements ActionListener {
	int x = 0, y = 0;
	JPanel drawPanel = new JPanel() {
		@Override
		public void paint(Graphics g) {
			g.clearRect(0, 0, this.getWidth(), this.getHeight());
			g.drawLine(x, y, x + 100, y + 100);
		}
	};
	JPanel controlPanel = new JPanel();
	JButton button = new JButton("Press me");
	
	{
		this.setLayout(new GridLayout(1, 2));
		this.add(drawPanel, BorderLayout.EAST);
		this.add(controlPanel, BorderLayout.WEST);
		controlPanel.add(button);
		button.addActionListener(this);
	}

	@Override
	public void actionPerformed(ActionEvent e) {
		x += 10;
		drawPanel.repaint();
	}
}