Got lost on this code and cant make it work - actionscript-3

Question

Im getting an weird error about constructions definitions that i have no idea what means.
Im studing this for a test.I think the problem is on the functions but im not sure.
Its a code from an game (pretty simple one) that you have to move your player from point b to point a without letting the falling asteroids touch you.
Thanks in advance.
import flash.display.MovieClip;
import flash.events.KeyboardEvent;
import flash.ui.Keyboard;
import flash.events.Event;
var up:Boolean;
var down:Boolean;
var left:Boolean;
var right:Boolean;
var vel:Number;
var velInimigo:Number;
var sentidoX:Number;
var sentidoY:Number;
var d:MovieClip;
var txt1:MovieClip;
var chegada:MovieClip;
var player:MovieClip;
var inimigos:Array;
var i:int;
var mc:MovieClip;
function MainTimeline()
{
addFrameScript(0, frame1);
return;
}
function OnKeyDown(event:KeyboardEvent) : void
{
switch(event.keyCode)
{
case Keyboard.W:
{
up = true;
break;
}
case Keyboard.S:
{
down = true;
break;
}
case Keyboard.A:
{
left = true;
break;
}
case Keyboard.D:
{
right = true;
break;
}
default:
{
break;
}
}
return;
}
function OnKeyUp(event:KeyboardEvent) : void
{
switch(event.keyCode)
{
case Keyboard.W:
{
up = false;
break;
}
case Keyboard.S:
{
down = false;
break;
}
case Keyboard.A:
{
left = false;
break;
}
case Keyboard.D:
{
right = false;
break;
}
default:
{
break;
}
}
return;
}
function OnFrame(event:Event) : void
{
var loc3: = null;
var loc4: = null;
if (up)
{
sentidoY = -1;
}
else if (down)
{
sentidoY = 1;
}
else
{
sentidoY = 0;
}
if (left)
{
sentidoX = -1;
}
else if (right)
{
sentidoX = 1;
}
else
{
sentidoX = 0;
}
if (sentidoX == 1 && sentidoY == 0)
{
player.rotation = 0 + 90;
}
else if (sentidoX == 1 && sentidoY == 1)
{
player.rotation = 45 + 90;
}
else if (sentidoX == 0 && sentidoY == 1)
{
player.rotation = 90 + 90;
}
else if (sentidoX == -1 && sentidoY == 1)
{
player.rotation = 135 + 90;
}
else if (sentidoX == -1 && sentidoY == 0)
{
player.rotation = 180 + 90;
}
else if (sentidoX == -1 && sentidoY == -1)
{
player.rotation = 225 + 90;
}
else if (sentidoX == 0 && sentidoY == -1)
{
player.rotation = 270 + 90;
}
else if (sentidoX == 1 && sentidoY == -1)
{
player.rotation = 315 + 90;
}
player.x = player.x + vel * sentidoX;
player.y = player.y + vel * sentidoY;
var loc2: = 0 ;
while (loc2 < inimigos.length)
{
loc3 = inimigos[loc2];
loc3.y = loc3.y + loc3.vel;
loc3.rotation = loc3.rotation + loc3.rotVel;
if (loc3.hitTestObject(player))
{
loc4 = new GameOverMC();
stage.addChild(loc4);
loc4.x = stage.stage.width / 2;
loc4.y = stage.stageHeight / 2;
stage.removeEventListener(Event.ENTERFRAME, OnFrame);
}
if (loc3.y > stage.stageHeight)
{
loc3.y = -loc3.height;
}
loc2++;
}
if (player.hitTestObject(chegada))
{
if (txt1 == null)
{
txt1 = new VitoriaMC();
stage.addChild(txt1);
txt1.x = stage.stage.width / 2;
txt1.y = stage.stageHeight / 2;
}
}
d.x = d.x + d.vel * d.sx;
d.y = d.y + d.vel * d.sy;
if (d.x >= stage.stageWidth - d.width / 2 || d.x <= d.width / 2)
{
d.sx = -d.sx;
}
if (d.y >= stage.stageHeight - d.height / 2 || d.y <= d.height / 2)
{
d.sy = -d.sy;
}
return;
}
function frame1()
{
vel = 5;
velInimigo = 2;
sentidoX = 0;
sentidoY = 0;
d = new DemoMC();
d.vel = 1;
d.sx = 1;
d.sy = 1;
d.x = stage.stageWidth / 2;
d.y = stage.stageHeight / 2;
txt1 = null;
chegada = new ChegadaMC();
player = new PlayerMC();
inimigos = new Array();
stage.addChild(d);
stage.addChild(chegada);
stage.addChild(player);
player.x = player.width / 2;
player.y = stage.stageHeight - player.height / 2;
chegada.x = stage.stageWidth - chegada.width;
chegada.y = 0;
i = 0;
while (i < 60)
{
mc = new AstroMC();
stage.addChild(mc);
inimigos.push(mc);
mc.x = 100 + Math.random() * (600 - mc.width);
mc.y = Math.random() * stage.stageHeight;
mc.rotVel = Math.random() * 10 - 5;
mc.vel = Math.random() * 3 + 1;
var loc1: = i;
var loc2: = i + 1;
loc1.i = loc2;
}
stage.addEventListener(KeyboardEvent.KEYDOWN, OnKeyDown);
stage.addEventListener(KeyboardEvent.KEYUP, OnKeyUp);
stage.addEventListener(Event.ENTERFRAME, OnFrame);
return;
}

Answer 1

It has been awhile since i have played with AS3 but i see a few odd things one being the
loc1.i = loc2;
near the bottom
what is "i" in relation to loc1? and this is in a while loop using i but never increments it so it seems like an infinite loop
again i could be wrong its been quite some time.