The act method of your Igloo class executes once for each igloo in your world each act step. Spawn your igloos from your World subclass (the World class API provides an act method for your worlds).

I copied and pasted it to the world method and it does nothing import greenfoot.*; // (Actor, World, Greenfoot, GreenfootImage) import java.awt.Color; public class SnowmanPalace extends World { /** * Create the Snowman Palace. Our world has a size * of 800x600 cells, where every cell is just 1 pixel. */ public SnowmanPalace() { super(800, 600, 1); createSun(); createSnowman(); createCamel(); createIgloo(); createHealth(); } public void createSun(){ addObject(new Sun(), Greenfoot.getRandomNumber(getWidth()), Greenfoot.getRandomNumber(getHeight())); } public void createSnowman() {addObject(new Snowman(), Greenfoot.getRandomNumber(getWidth()), Greenfoot.getRandomNumber(getHeight())); } public void createCamel() { for ( int camel = 0; camel < 2; camel ++) { addObject(new Camel(), Greenfoot.getRandomNumber(getWidth()), Greenfoot.getRandomNumber(getHeight())); } } private int igloo = 0; public void createIgloo() { while (igloo < 4){ igloo++; addObject(new Igloo(), Greenfoot.getRandomNumber(getWidth()), Greenfoot.getRandomNumber(getHeight())); } createNewIgloo(); } public void createHealth() {addObject(new Health(), 100, 100); } private int iglooCount = 0; private void createNewIgloo() { iglooCount++; if (iglooCount == 100) { newIgloo(); iglooCount = 0; }} private void newIgloo() { addObject(new Igloo(), Greenfoot.getRandomNumber(getWidth()), Greenfoot.getRandomNumber(getHeight())); }

Now it just adds one more to the start up screen private int iglooCount = 100; private void createNewIgloo() { iglooCount --; if (iglooCount > 0) { newIgloo(); iglooCount = 100; } } private void newIgloo() { addObject(new Igloo(), Greenfoot.getRandomNumber(getWidth()), Greenfoot.getRandomNumber(getHeight())); }

I am re-posting the code properly (see the link below the reply box: Posting code? read this!). Your second code post will be ignored (it is not correct and what you had was sufficient to begin with). I do not see where you added an act method to the class Add it:

All good

All Good