Changing the already given actionscript

Question

I have two action scripts in which i have to change the following, but im still unsure what parts I need to edit and what i should write instead
1. position the first main circle in the centre of the stage;
2. set all drawing colours for circles to random shades of green;
3. set all drawing colours for branches to black;
4. give each circle 3 branches instead of 2;
5. replace all circles with squares using what would have been the circle's radius as the square's width;
6. stop the automatic animating rotation and only have the objects rotate when the space bar is held down.
package
import flash.display.Sprite;
public class Branch extends Sprite
   var theTree:Tree;
   var level:Number;
   var children:Array;
   public function Branch (controller:Tree, l:Number)
      theTree = controller;
      level = l;
      var myColour:Number = Math.floor(Math.random()*0xFFFFFF);
      var rad:Number = (theTree.maxlevel - level) * 10;
      var linelen:Number = (theTree.maxlevel - level) * 30;
      var lineweight:Number = (theTree.maxlevel - level);
      this.graphics.beginFill(myColour);
      this.graphics.drawSquare(0, 0, rad);
      this.graphics.endFill();
      this.graphics.beginFill(myColour);
      this.graphics.drawSquare(0, -linelen, rad);
      this.graphics.endFill();
      this.graphics.moveTo(0,0);
      this.graphics.lineStyle(lineweight, myColour);
      this.graphics.lineTo(0, -linelen);
      if (level < theTree.maxlevel)
         children = new Array();
for (var x:Number = 0; x < theTree.children; x++)
            var childBranch:Branch = new Branch(theTree, level+1);
            childBranch.x = 0;
            childBranch.y = -linelen;
            addChild(childBranch);
            children.push(childBranch);
      this.rotation = Math.floor(Math.random() * 360) - 180;
public function update()
   if (children)
      for each (var child in children) { child.update(); }
   this.rotation += 1;
function keyPressed(event:KeyboardEvent):void
if(event.keyCode == Keyboard.SPACE)
package
import flash.display.MovieClip;
import flash.display.Sprite;
import flash.utils.Timer;
import flash.events.TimerEvent;
public class Tree extends MovieClip
   var children:Number = 2;
   var maxlevel:Number = 5;
   var trunk:Branch;
var timer:Timer;
   public function Tree ()
      trunk = new Branch(this, 1);
      trunk.x = 200;
      trunk.y = 200;
      addChild(trunk);
timer = new Timer(10);
         timer.addEventListener(TimerEvent.TIMER, controlLoop);
         timer.start();
function controlLoop(event:TimerEvent):void
        trunk.update();

Answer 1

(that sounds like your homework.)