public class Lab1
{

  public static void drawTarget()
  {
    Draw.window(400,400);

    Draw.setColor(255,0,0);   // red
    Draw.setFill(true);
    Draw.oval(50,50,300,300);
    Draw.setColor(0,0,0);     // black
    Draw.setFill(false);
    Draw.oval(50,50,300,300);

    Draw.setColor(255,255,255);   // white
    Draw.setFill(true);
    Draw.oval(100,100,200,200);
    Draw.setColor(0,0,0);     // black
    Draw.setFill(false);
    Draw.oval(100,100,200,200);

    Draw.setColor(255,0,0);   // red
    Draw.setFill(true);
    Draw.oval(150,150,100,100);
    Draw.setColor(0,0,0);     // black
    Draw.setFill(false);
    Draw.oval(150,150,100,100);
  }

  public static void drawTrafficLight()
  {
    Draw.window(300,500);

    Draw.rectangle(100,100,100,300);

    Draw.setColor(255,0,0);     // red
    Draw.setFill(true);
    Draw.oval(100,100,100,100);

    Draw.setColor(255,255,0);   // yellow
    Draw.setFill(true);
    Draw.oval(100,200,100,100);

    Draw.setColor(0,255,0);     // green
    Draw.setFill(true);
    Draw.oval(100,300,100,100);

  }

  public static void drawAbstractArt()
  {
    Draw.window(400,400);

    Draw.setFill(true);

    Draw.setColor(0,0,255);    // blue
    Draw.rectangle(0,0,400,400);
    Draw.setColor(255,0,0);    // red
    Draw.rectangle(50,50,100,100);
    Draw.rectangle(250,250,100,100);
    Draw.rectangle(200,0,200,200);
    Draw.rectangle(0,200,200,200);
    Draw.setColor(0,0,255);    // blue
    Draw.rectangle(250,50,100,100);
    Draw.rectangle(50,250,100,100);

  }

}