import greenfoot.*; public class MyWorld extends World { public int a = 0; private int threshold = 100; //increase to make the time until a random thing is added longer... private int thresholdWave = 3; //increase to make the time until a random thing is added longer... Counter counter = new Counter(); /** * Creates a world with the size of 1100x500 cells, where every cell is just 1 pixel */ public MyWorld() { super(1100, 500,1); addObject(counter, 50, 25); } public void act() { a++; if(a == threshold) { RandomPlacement(); a = 0; } } public void RandomPlacement() { int x = Greenfoot.getRandomNumber(getWidth()); int y = 10; addObject (new Rock(counter),x,y); } { if (Greenfoot.mouseClicked(this)){ // Hvis der er trykket med musen på objektet sker følgende int x= Greenfoot.getRandomNumber (getWidth());//generer tilfældigt nummer int y= Greenfoot.getRandomNumber (getHeight());//generer tilfældigt nummer } } }