Everywhere where there is the exact word laser (the word on its own with all lower cases) in the code, it comes up with an error saying cannot find symbol - variable laser
// first laser and its button LaserWall laser = new LaserWall(); // create laser addObject(laser, << wherever >>); // add laser to world LaserButton button = new LaserButton(laser); // create button for laser addObject(button, << wherever >>); // add button to world // second laser and its button LaserWall laser2 = new LaserWall(); // create laser2 addObject(laser2, << wherever >>); // add laser2 to world LaserButton button2 = new LaserButton(laser2); // create button2 for laser2 addObject(button2, << wherever >>); // add button2 to world // third laser and its button ....