local pos = {x = 0, y = 0, z = 0} -- ring center
local size = 3
local step = 4

for i = 0, 360, step do

	local angle = (i * math.pi / 180)
	local x = size * math.cos(angle)
	local z = size * math.sin(angle)
	local newpos = {x = pos.x + x, y = pos.y + 1, z = pos.z + z}

	minetest.add_particle({
		pos = newpos,
		velocity = {x = 0, y = 0, z = 0},
		acceleration = {x = 0, y = 0, z = 0},
		expirationtime = 0.25,
		collisiondetection = false,
		texture = "default_wood.png",
		size = 5,
		glow = 15,
	})

end