import javafx.scene.paint.Color;
import javafx.scene.canvas.GraphicsContext;
public class Square implements Drawable
{
    private final double x;
    private final double y;
    private final double size;
    private final Color color;
    public Square(double x, double y, double size, Color color)
    {
        this.x = x;
        this.y = y;
        this.size = size;
        this.color = color;
    }
    public void draw(GraphicsContext pen)
    {
        pen.setFill(color);
        pen.fillRect(x - size, y - size, 2*size, 2*size);
    }
}