How to make an object disappear from screen?

Question

I am trying to make a simple pacman game in javafx. I've been stuck trying to get the pills to delete from screen once pacman "eats" them. I used a sequence to store the pills. I have collision detection working between the pills and pacman, i.e. the computer knows the pacman comes into contact with a pill. When pacman "eats" a pill it deletes from that pill sequence but it still remains on the screen. I have been stuck for hours on this. I have 4 classes created - pacman, pill, map, and main.
the pill class (minus the import statements)
public class Pill{
    var x = 42;
    var y = 85;
    var opacity = 1.0;
    var pill: Node;
    var pill2: Node;
    var pills: Node[];
    var pills2 = bind pills;
    var map:Map = new Map();
    var removePill = Timeline {
        repeatCount: Timeline.INDEFINITE
        keyFrames : [
            KeyFrame {
                time : 0s
                values : [
                    pill2.opacity => 1 tween Interpolator.LINEAR
            KeyFrame {
                time: 1s
                values : [
                    pill2.opacity => 0.0 tween Interpolator.LINEAR
    public function create(x: Integer, y: Integer): Node{
        Circle {
            centerX: x,
            centerY: y
            radius: 5
            fill: Color.ORANGE
    public function populatePills() {
        var countX = 0;
        var countY = 0;
        if(sizeof pills == 0){
            while( countX < 16 ){
                while( countY < 18){
                    x = x + 43;
                    pill = create(x,y);
                    for(obst in map.map()) {
                        if(obst.boundsInLocal.intersects(x-5, y-5, 10, 10)) {
                            pill.visible = false;
                    if(x > 380 and x < 520 and y > 320 and y < 370){
                        pill.visible = false;
                    if(pill.visible == true){
                    insert pill into pills;
                    countY++;
            y = y + 35;
            x = 42;
            countY = 0;
            countX++;
        println(sizeof pills2);
        removePill.playFromStart();
        delete pill2 from pills;
        return pills2;
    public function deletePill(i: Integer){
        //delete pills[i] from pills;
        pill2 = pills;
return pill2;
}*pacman class (only the part of code used for collision detection with pills)*for(obst in pills.populatePills()) {
if(obst.boundsInLocal.intersects(nextposx - 20, nextposy - 20, 40, 40)) {
pills.deletePill(pillCounter);
pillCounter++;
pillCounter = 0;*and finally, the main class (used to output everything to screen)*var pm: Pacman = new Pacman();
var ghost: Ghost = new Ghost();
var pills: Pill = new Pill();
Stage {
title: "PacmanFX"
width: 900
height: 700
scene: Scene {
fill: Color.BLACK
content: [
pills.populatePills()
map.map()
pm.create()
}Help would be greatly appreciated as I am completly stumped!!                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

Answer 1

I solved it. I declared the pills class & created a pills sequence the pacman class. And in the main class I called the pills sequence from pacman class, not from the pills class.