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Unsure if calling function correctly


Bari Sax
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Hi all, still a new developer and learning the ropes. I'm currently building a bullet-hell esque game and I'm not sure if I'm generating enemies correctly. I get no console log errors, but none spawn on load. I'm using Phaser 2.4.6. Here's some code 

var enemyUfo;

function create() {

enemyUfo = game.add.group();
            enemyUfo.enableBody = true;
            enemyUfo.physicsBodyType = Phaser.Physics.ARCADE;
            enemyUfo.createMultiple(7, 'ufo-enemy');
            enemyUfo.setAll('anchor.x', 0.5);
            enemyUfo.setAll('anchor.y', 0.5);
            enemyUfo.setAll('scale.x', 0.5);
            enemyUfo.setAll('scale.y', 0.5);
            enemyUfo.setAll('angle', 180);
            enemyUfo.setAll('outOfBoundsKill', true);
            enemyUfo.setAll('checkWorldBounds', true);

            launchEnemyUfo();
        }

function launchEnemyUfo() {
                    var MIN_ENEMY_SPACING = 300;
                    var MAX_ENEMY_SPACING = 3000;
                    var ENEMY_SPEED = 300;

                    var enemy = enemyUfo.getFirstExists(false);
                    if (enemy) {
                        enemy.reset(game.rnd.integerInRange(0, game.width), -20);
                        enemy.body.velocity.x = game.rnd.integerInRange(-300, 300);
                        enemy.body.velocity.y = ENEMY_SPEED;
                        enemy.body.drag.x = 100;
                    }

                    // MARS ATTACKS!!
                    game.time.events.add(game.rnd.integerInRange(MIN_ENEMY_SPACING, MAX_ENEMY_SPACING), launchEnemyUfo);
                }

 

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