It's like you're installing Windows 8 all over again!

Colour.java

package com.n1nja.colour;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import javax.swing.*;
public class Colour implements KeyListener{
	public static void main(String[] args) {
		new Colour();
	}
	private JFrame window;
	private JPanel colorPanel;
	private JLabel notice;
	private boolean isStarted;
	private int maxChroma = 200;
	private int minChroma = 50;
	private int delay = 20;
	private Colour() {
		this.isStarted = false;
		this.setup();
		this.start();
	}
	private void setup() {
		this.window = new JFrame("Colour");
		this.window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.window.setExtendedState(Frame.MAXIMIZED_BOTH);
		this.window.setUndecorated(true);
		this.window.addKeyListener(this);
		/*
		 * Hide the cursor.
		 * From http://stackoverflow.com/a/1984117
		 */
		this.window.setCursor(Toolkit.getDefaultToolkit().createCustomCursor(new BufferedImage(16, 16, BufferedImage.TYPE_INT_ARGB), new Point(0, 0), "blank"));
		this.colorPanel = new JPanel(new BorderLayout());
		this.colorPanel.setBackground(new Color(maxChroma, minChroma, minChroma));
		this.notice = new JLabel("Setting up Windows");
		this.notice.setHorizontalAlignment(SwingConstants.CENTER);
		this.notice.setVerticalAlignment(SwingConstants.CENTER);
		this.notice.setFont(new Font("Segoe UI", Font.PLAIN, 42));
		this.notice.setForeground(Color.WHITE);
		this.colorPanel.add(this.notice);
		this.window.add(this.colorPanel);
	}
	private void start() {
		this.isStarted = true;
		this.window.setVisible(true);
		new Thread(new Runnable() {
			@Override
			public void run() {
				while (true) {
					Color bg = colorPanel.getBackground();
					int red = bg.getRed();
					int green = bg.getGreen();
					int blue = bg.getBlue();
					if ((red == maxChroma) && (green < maxChroma) && (blue == minChroma)) {
						green++;
					} else if ((red <= maxChroma) && (red > minChroma) && (green == maxChroma)) {
						red--;
					} else if ((green == maxChroma) && (blue < maxChroma) && (red == minChroma)) {
						blue++;
					} else if ((green <= maxChroma) && (green > minChroma) && (blue == maxChroma)) {
						green--;
					} else if ((blue == maxChroma) && (red < maxChroma) && (green == minChroma)) {
						red++;
					} else if ((blue <= maxChroma) && (blue > minChroma) && (red == maxChroma)) {
						blue--;
					}
					colorPanel.setBackground(new Color(red, green, blue));
					try {
						Thread.sleep(delay);
					} catch (InterruptedException e) {
						e.printStackTrace();
					}
				}
			}
		}).start();
	}
	@Override
	public void keyTyped(KeyEvent e) {}
	@Override
	public void keyPressed(KeyEvent e) {
		if (this.isStarted && (e.getKeyCode() == KeyEvent.VK_ESCAPE)) {
			System.exit(0);
		}
	}
	@Override
	public void keyReleased(KeyEvent e) {}
}