use_mesecons = false

function npc_spawner(pos)
minetest.env:add_entity({x=pos.x+math.random(-1,1),y=pos.y+math.random(2,3),z=pos.z+math.random(-1,1)}, "peaceful_npc:npc")
--[[    local count = minetest.env:get_objects_inside_radius(pos, 20)
    local MAX_NPC = 3

    if count>MAX_NPC then
        action_off = minetest.env:add_entity({x=pos.x+math.random(-1,1),y=pos.y+math.random(2,3),z=pos.z+math.random(-1,1)}, "peaceful_npc:npc")
        end
    end]]--

    if use_mesecons == true then
        minetest.register_node("peaceful_npc:npc_spawner", {
            description = "NPC Portal",
            drawtype = "glasslike",
            groups = {snappy=1,choppy=2,oddly_breakable_by_hand=2,flammable=3,wood=1},
            sounds = default.node_sound_glass_defaults(),
            tiles = {"peaceful_npc_spawner.png"},
            sunlight_propagates = true,
            paramtype = "light",
            mesecons = {effector = {
                action_on = npc_spawner
            }}
        })
    end

if use_mesecons == false then
    minetest.register_node("peaceful_npc:npc_spawner", {
        description = "NPC Portal",
        drawtype = "glasslike",
        groups = {snappy=1,choppy=2,oddly_breakable_by_hand=2,flammable=3,wood=1},
        sounds = default.node_sound_glass_defaults(),
        tiles = {"peaceful_npc_spawner.png"},
        sunlight_propagates = true,
        paramtype = "light",
    })
    minetest.register_abm({
        nodenames = {"peaceful_npc:npc_spawner"},
        interval = 5.0,
        chance = 1,
        action = function(pos)
            npc_spawner(pos)
        end,
    })
end