Creating a box that moves accross the screen in phaser 3

Question

This is my code, I posted this question earlier but it was not very clear so I am making a repost The issue is in the createBox() function (or when it gets called). The box gets created once when the game starts but cannot be created again with the keypress of s. I would like help making the box spawn in when s is pressed and move across the screen. The player should be able to jump off of the box.

const config = {
  type: Phaser.AUTO,
  width: 1905,
  height: 1000,
  backgroundColor: '#000',
  physics: {
    default: 'arcade',
    arcade: {
      gravity: {
        y: 300
      },
      debug: false
    }
  },
  scene: {
    preload: preload,
    create: create,
    update: update
  }
};
const game = new Phaser.Game(config);
var player
var wait = 1
var boxes
function preload() {
  this.load.image('player', 'assets/repl.png');
  this.load.image('ocean', 'assets/water.png');
  this.load.image('background', 'assets/background.png');
  this.load.image('box', 'assets/box.png');
  this.load.image('platform1', 'assets/platform1.png');
  this.load.image('platform2', 'assets/platform2.png');
  this.load.image('platform3', 'assets/platform3.png');
  this.load.image('platform4', 'assets/platform4.png');
}

function create() {
  this.add.image(950, 450, 'background').setScale(1.4);
  this.w = this.input.keyboard.addKey(Phaser.Input.Keyboard.KeyCodes.W)
  this.a = this.input.keyboard.addKey(Phaser.Input.Keyboard.KeyCodes.A)
  this.s = this.input.keyboard.addKey(Phaser.Input.Keyboard.KeyCodes.S)
  this.d = this.input.keyboard.addKey(Phaser.Input.Keyboard.KeyCodes.D)
  waters = this.physics.add.staticGroup();
  waters.create(952, 958, 'ocean').setScale(1.4).refreshBody();

  platform1s = this.physics.add.staticGroup();
  platform1s.create(952, 858, 'platform1').setScale(0.5).refreshBody();

  player = this.physics.add.sprite(1000, 500, 'player').setScale(0.05);
  player.setCollideWorldBounds(true);

  box = this.physics.add.group();
  boxes = box.create(0, 900, 'box').setScale(0.1);
  boxes.body.setAllowGravity(false);
  boxes.setVelocityX(200)

  this.physics.add.collider(player, waters, hitWater, null, this);
  this.physics.add.collider(player, platform1s);
  // this.physics.add.collider(player, platform2s);
  // this.physics.add.collider(player, platform3s);
  // this.physics.add.collider(player, platform4s);
  this.physics.add.collider(player, boxes);
}

function update() {
  let cursors = this.input.keyboard.createCursorKeys();
  if (this.a.isDown) {
    player.setVelocityX(-300)
  } else if (this.d.isDown) {
    player.setVelocityX(300)
  } else {
    player.setVelocityX(0)
  }
  if (this.w.isDown && player.body.touching.down) {
    player.setVelocityY(-400)
  }
  if (this.s.isDown) {
    if (wait = 1) {
      createBox()
    }
  }
}
function createBox() {
  box = this.physics.add.group();
  boxes = box.create(0, 900, 'box').setScale(0.1);
  boxes.body.setAllowGravity(false);
  boxes.setVelocityX(200)
  this.physics.add.collider(player, boxes);
  this.time.delayedCall(1000, delayer, null, this);
}
function hitWater() {
  this.physics.pause();
  player.setTint(0xff0000);
  this.time.delayedCall(3000, restart, null, this);
}
function restart() {
  this.scene.stop();
  this.scene.start();
}
function delayer() {
  wait = 1
}