var elapsedTurns = 0;

var ison = true;
var maxSize = 100;
var maxWidth = 500;
var maxHeight = 500;

var theCreature;
var theCreature2;

var interval = 10;
var creatureList = new Array();
var grid = new MultiDimensionalArray(maxWidth, maxHeight);

function rand(maxNum){
     return Math.round(maxNum*Math.random());
}

function createNewEnvironment(){
     
     size = rand(maxSize);
     creatureList[0] = new Creature();
     creatureList[0].createAt("thisId1", 0, rand(maxWidth-size),    
                rand(maxHeight-size), size, 
                rand(255), rand(255), rand(255),
                -10 + rand(20), -10 + rand(20));
     size = rand(maxSize);
     creatureList[1] = new Creature();
     creatureList[1].createAt("thisId2", 1, rand(maxWidth-size),                 
                rand(maxHeight-size), size, 
                rand(255), rand(255), rand(255),
                -10 + rand(20), -10 + rand(20));

     setTimeout("nextTurn()", interval);
}

function nextTurn(){

     for(var thisCreatureIndex =0; 
         thisCreatureIndex < creatureList.length; 
         thisCreatureIndex++) {
          
         creatureList[thisCreatureIndex].move();
     }

     if (ison){
         setTimeout("nextTurn()", interval);
     }
     elapsedTurns++;
}