talk.lua

local unit05_messages = {
  "Hello, tiny friend!",
  "Greetings.",
  "I wonder what happened to unit 6 & 7..",
  "Oh. Uhh. Hi!",
  "Are you taking good care of the friends I gave you?",
  "Beep boop. I am bored.",
  "Sorry, were you saying something?",


}

script.on_nth_tick(3600, function()
  for _, player in pairs(game.connected_players) do

    local entity = player.surface.find_entities_filtered{name="unit-05"}
    for _, entity in pairs(entity) do
      if player.position and entity.valid then
        local dx = player.position.x - entity.position.x
        local dy = player.position.y - entity.position.y
        local dist = math.sqrt(dx*dx + dy*dy)
        if dist < 10 then
          trigger_message(player, entity)
        end
      end
    end
  end
end)

function trigger_message(player, entity)
    -- FIX: storage.rng.talk(N) instead of math.random(N).
    -- The talk generator is created in init_debris() alongside the others.
    local msg = unit05_messages[storage.rng.talk(#unit05_messages)]

    rendering.draw_text{
        text = msg,
        surface = entity.surface,
        target = entity,
        target_offset = {0, -2},
        color = {r=1, g=1, b=0.8},
        scale = 1.5,
        time_to_live = 300,
        players = {player}
    }
end