how would i incorperate multi-threads in my coding to make the last section all execute at the same time(ive highlighted the last section):


/**
* draw a balloon on to a canvas
* then to make them fly
*
* @author (chris twaits)
* @version (12/10/07)
*/
public class Balloons
{
private Circle top;
private Triangle middle;
private Triangle bottom;
private Circle top2;
private Triangle middle2;
private Triangle bottom2;
private Circle top3;
private Triangle middle3;
private Triangle bottom3;

/**
* construct object
*/
public void draw()
{
top = new Circle();
top.changeColor("red");
top.moveHorizontal(8);
top.moveVertical(121);
top.changeSize(60);
top.makeVisible();

middle = new Triangle();
middle.changeColor("green");
middle.changeSize(-38, 55);
middle.moveHorizontal(8);
middle.moveVertical(247);
middle.makeVisible();

bottom = new Triangle();
bottom.changeColor("blue");
bottom.changeSize(7, 11);
bottom.moveHorizontal(8);
bottom.moveVertical(246);
bottom.makeVisible();

top2 = new Circle();
top2.changeColor("blue");
top2.moveHorizontal(125);
top2.moveVertical(175);
top2.changeSize(60);
top2.makeVisible();

middle2 = new Triangle();
middle2.changeColor("magenta");
middle2.changeSize(-38, 55);
middle2.moveHorizontal(125);
middle2.moveVertical(301);
middle2.makeVisible();

bottom2 = new Triangle();
bottom2.changeColor("green");
bottom2.changeSize(7, 11);
bottom2.moveHorizontal(125);
bottom2.moveVertical(300);
bottom2.makeVisible();


top3 = new Circle();
top3.changeColor("yellow");
top3.moveHorizontal(240);
top3.moveVertical(141);
top3.changeSize(60);
top3.makeVisible();

middle3 = new Triangle();
middle3.changeColor("blue");
middle3.changeSize(-38, 55);
middle3.moveHorizontal(240);
middle3.moveVertical(267);
middle3.makeVisible();

bottom3 = new Triangle();
bottom3.changeColor("black");
bottom3.changeSize(7, 11);
bottom3.moveHorizontal(240);
bottom3.moveVertical(266);
bottom3.makeVisible();

}
/**
* Create method for balloons to fly
*/

public void slowMoveVertical ()

{
top.slowMoveVertical(-50);
top2.slowMoveVertical(-50);
top3.slowMoveVertical(-50);
middle.slowMoveVertical(-50);
middle2.slowMoveVertical(-50);
middle3.slowMoveVertical(-50);
bottom.slowMoveVertical(-50);
bottom2.slowMoveVertical(-50);
bottom3.slowMoveVertical(-50);
}
}