minetest.register_abm({
nodenames = {"portals:skyportal_center"},
interval = 3,
chance = 1,
action = function(pos)
	local objs   = minetest.env:get_objects_inside_radius(pos, 1)

	if objs[1] == nil then
		return false;
	else
		for k, obj in pairs(objs) do
			local objpos = obj:getpos()
			local groundmat = "default:dirt"
			portalpos1 = pos
			ypos = pos.y+800
			--dirtlayer
			minetest.env:add_node({x=pos.x, y=ypos-1, z=pos.z}, {name=groundmat})
			--portallayer
			minetest.env:add_node({x=pos.x, y=ypos, z=pos.z}, {name="portals:skyportal_center2"})
			portalpos2 = {x=pos.x, y=ypos, z=pos.z}
			minetest.env:add_node({x=pos.x+1, y=ypos, z=pos.z}, {name="portals:skyportal_rim2"})
			minetest.env:add_node({x=pos.x-1, y=ypos, z=pos.z}, {name="portals:skyportal_rim2"})
			minetest.env:add_node({x=pos.x, y=ypos, z=pos.z+1}, {name="portals:skyportal_rim2"})
			minetest.env:add_node({x=pos.x, y=ypos, z=pos.z-1}, {name="portals:skyportal_rim2"})
			minetest.env:add_node({x=pos.x+1, y=ypos, z=pos.z+1}, {name="portals:skyportal_rim"})
			minetest.env:add_node({x=pos.x-1, y=ypos, z=pos.z-1}, {name="portals:skyportal_rim"})
			minetest.env:add_node({x=pos.x-1, y=ypos, z=pos.z+1}, {name="portals:skyportal_rim"})
			minetest.env:add_node({x=pos.x+1, y=ypos, z=pos.z-1}, {name="portals:skyportal_rim"})
			--dirtlayer 2
			minetest.env:add_node({x=pos.x+2, y=ypos, z=pos.z}, {name=groundmat})
			minetest.env:add_node({x=pos.x-2, y=ypos, z=pos.z}, {name=groundmat})
			minetest.env:add_node({x=pos.x, y=ypos, z=pos.z+2}, {name=groundmat})
			minetest.env:add_node({x=pos.x, y=ypos, z=pos.z-2}, {name=groundmat})
			minetest.env:add_node({x=pos.x+2, y=ypos, z=pos.z+2}, {name=groundmat})
			minetest.env:add_node({x=pos.x-2, y=ypos, z=pos.z-2}, {name=groundmat})
			minetest.env:add_node({x=pos.x-2, y=ypos, z=pos.z+2}, {name=groundmat})
			minetest.env:add_node({x=pos.x+2, y=ypos, z=pos.z-2}, {name=groundmat})
			obj:setpos(portalpos2)

		end
	end
end,
})