Enemy spawing and player tracking

I am new and Im trying to make enemies move towards the player and spawn(max 2-5), but how do I get that done?

What I do is I use code to figure out whether the player is to the left or right of the enemy and then I use that info to make it move towards the player. Essentially, I find if the player is to the enemy's left or right and than I move the enemy in the direction of the player.

Here is a basic example:

//In this code, X is right.

if enemy.x > player.x then

enemy.x -= 1

end

if enemy.x < player.x then

enemy.x += 1

end

And to spawn enemies, build their details as objects and then draw them in with screen.drawSprite() like any other sprite.

Actor = class
  constructor = function(x, y, size, color, frameColor = "orange", liveCount = 100)
    this.x = x
    this.y = y
    this.size = size
    this.color = color
    this.frameColor = frameColor
    this.liveCount = liveCount
    this.drawLiveCount = true
  end
  
  draw = function()
    screen.fillRect(this.x, this.y, this.size, this.size, this.color)
    screen.drawRect(this.x, this.y, this.size, this.size, this.frameColor)
    if this.drawLiveCount then 
      screen.drawText(this.liveCount, this.x, this.y+this.size/2+this.size*0.2, 10, this.color)
    end
  end
end

Enemy = class extends Actor
  constructor = function(x, y)
    super(x, y, 20, "red")
  end
  
  hit = function( bullet )
    this.liveCount -= bullet.power
  end
  
  update = function(target)
    local direct_x = target.x - this.x
    local direct_y = target.y - this.y
    if direct_x < 0 then
      this.x -= 0.1
    else
      this.x += 0.1
    end
    if direct_y < 0 then
      this.y -= 0.1
    else
      this.y += 0.1
    end
  end
end

Player = class extends Actor
  constructor = function(x, y)
    super(x, y, 30, "green")
    this.bullets = []
  end
  
  update = function()
    if keyboard.UP then
      this.y += 1
    elsif keyboard.DOWN then
      this.y -= 1
    elsif keyboard.LEFT then
      this.x -= 1
    elsif keyboard.RIGHT then
      this.x += 1
    end
    

    if keyboard.SPACE and this.bullets.length < 5 then
      local direction = object x= 0 y= 0 end
      if keyboard.UP then direction.y = 1
      elsif keyboard.DOWN then direction.y = -1
      elsif keyboard.LEFT then direction.x = -1
      elsif keyboard.RIGHT then direction.x = 1
      end
      if direction.x != 0 or direction.y != 0 then
        this.bullets.push(new Bullet(this.x, this.y, direction))
      end
    end
    

    for bullet in this.bullets
      bullet.update()
    end
    
    this.bullets = this.bullets.filter(function(bullet)
      return bullet.x > -screen.width/2 and bullet.x < screen.width/2 and
            bullet.y > -screen.height/2 and bullet.y < screen.height/2
    end)
  end
  
  draw = function()
    super()
    for bullet in this.bullets
      bullet.draw()
    end
  end
end

Bullet = class extends Actor
  constructor = function(x, y, direction)
    super(x, y, 5, "yellow")
    this.direction = direction
    this.speed = 5
    this.drawLiveCount = false
    this.power = 5
  end
  
  update = function()
    this.x += this.direction.x * this.speed
    this.y += this.direction.y * this.speed
  end
end

init = function()
  player = new Player(0, 0)
  enemies = []
  for index = 1 to 20 by 1
    enemies.push(new Enemy(random.nextInt(screen.width) - screen.width / 2,
                          random.nextInt(screen.height) - screen.height / 2))
  end
end

update = function()
  player.update()
  enemies.forEach(function(enemy) enemy.update(player) end)
  
  for bullet in player.bullets
    for enemy in enemies
      if checkCollision(bullet, enemy) then
        enemy.hit( bullet )
        if enemy.liveCount < 1 then
          enemies = enemies.filter(function(e) return e != enemy end)
        end
        player.bullets = player.bullets.filter(function(b) return b != bullet end)
      end
    end
  end
end

draw = function()
  screen.clear()
  screen.drawText("WASD or Arrow to Move, SPACE to Shoot", 0, 90, 20, "orange")
  player.draw()
  enemies.forEach(function(enemy) enemy.draw() end)
end


checkCollision = function(obj1, obj2)
  return abs(obj1.x - obj2.x) < (obj1.size + obj2.size) / 2 and
        abs(obj1.y - obj2.y) < (obj1.size + obj2.size) / 2
end

https://microstudio.io/i/Loginus/actoratan2/