I removed the first words in the two lines you mentioned, and true from the other part of the code, but now it says ( or import greenfoot.*; // (World, Actor, GreenfootImage, Greenfoot and MouseInfo) /** * Write a description of class paper here. * * @author (your name) * @version (a version number or a date) */ public class paper extends World { private Frog frog; private Snake snake; /** * Constructor for objects of class paper. * */ public paper() { // Create a new world with 600x400 cells with a cell size of 1x1 pixels. super(600, 400, 1); prepare(); } /** * Prepare the world for the start of the program. * That is: create the initial objects and add them to the world. */ private void prepare() { fly fly = new fly(); addObject(fly,368,204); fly fly2 = new fly(); addObject(fly2,473,123); fly fly3 = new fly(); addObject(fly3,467,347); fly fly4 = new fly(); addObject(fly4,170,101); fly fly5 = new fly(); addObject(fly5,216,333); Label label = new Label("Frog: 0"); Marker marker= new Marker("Snake: 0"); frog = new Frog(label); addObject(frog, 100, 100); snake = new Snake(marker); addObject(snake,76,150); frog.setLocation(77,223); frog.setLocation(69,245); addObject(marker,571,21); marker.setLocation(563,23); marker.setLocation(576,14); marker.setLocation(528,23); marker.setLocation(573,69); marker.setLocation(555,18); marker.setLocation(569,15); marker.setLocation(559,15); marker.setLocation(541,20); addObject(label,51,36); label.setLocation(63,21); marker.setLocation(531,17); marker.setLocation(544,19); label.setLocation(26,13); label.setLocation(52,12); marker.setLocation(550,20); label.setLocation(96,21); marker.setLocation(562,17); marker.setLocation(562,26); fly.setLocation(328,193); snake.setLocation(48,57); frog.setLocation(38,359); } public void act() { if (getObjects(fly.class).isEmpty()) { Greenfoot.stop(); } if(frog.acount > snake.bcount) { FrogWins frogwins= new FrogWins(); addObject(new FrogWins, getWidth()/2, getHeight()/2); Greenfoot.stop(); return; } if(frog.acount < snake.bcount) { SnakeWins snakewins= new SnakeWins(); addObject(new SnakeWins, getWidth()/2, getHeight()/2); Greenfoot.stop(); return; } } }

You need to keep the parentheses -- just not with the true in them. What error do you then get?

You need to give your FrogWins and SnakeWins classes default images or create images for them in their constructor blocks. Also, you need to place a condition on your count comparisons, in that no Fly object can be in the world.

Currently, this is your act method: Change it to: