ComfyFactorio/modules/biters_attack_moving_players.lua

--moving players attract biters from far away

local event = require 'utils.event'
local math_random = math.random

local function on_player_changed_position(event)
	if math_random(1, 128) ~= 1 then return end
	if game.tick - global.biters_attack_moving_players_last_action_tick < 7200 then return end
	local player = game.players[event.player_index]
	if not player.character then return end
	local amount = math.floor(game.tick * 0.0005) + 1
	if amount > 32 then amount = 32 end
	player.surface.set_multi_command({
		command={
			type = defines.command.attack_area,
			destination = player.position,
			radius = 16,
			distraction=defines.distraction.by_anything
			},
		unit_count = amount,
		force = "enemy",
		unit_search_distance=1024
	})
	global.biters_attack_moving_players_last_action_tick = game.tick
end

local function on_init(event)
	global.biters_attack_moving_players_last_action_tick = 0
end

event.add(defines.events.on_player_changed_position, on_player_changed_position)
event.on_init(on_init)