function remove_leaves (pos,oldnode)
        local node1 = minetest.get_node({x=pos.x-1,y=pos.y,z=pos.z})
        local node2 = minetest.get_node({x=pos.x+1,y=pos.y,z=pos.z})
        local node3 = minetest.get_node({x=pos.x,y=pos.y-1,z=pos.z})
        local node4 = minetest.get_node({x=pos.x,y=pos.y+1,z=pos.z})
        local node5 = minetest.get_node({x=pos.x,y=pos.y,z=pos.z-1})
        local node6 = minetest.get_node({x=pos.x,y=pos.y,z=pos.z+1})
        if node1.name == "default:leaves" or node1.name == "default:jungleleaves" then
            minetest.remove_node({x=pos.x-1,y=pos.y,z=pos.z})
        end
        if node2.name == "default:leaves" or node2.name == "default:jungleleaves" then
            minetest.remove_node({x=pos.x+1,y=pos.y,z=pos.z})
        end
        if node3.name == "default:leaves" or node3.name == "default:jungleleaves" then
            minetest.remove_node({x=pos.x,y=pos.y-1,z=pos.z})
        end
        if node4.name == "default:leaves" or node4.name == "default:jungleleaves" then
            minetest.remove_node({x=pos.x,y=pos.y+1,z=pos.z})
        end
        if node5.name == "default:leaves" or node5.name == "default:jungleleaves" then
            minetest.remove_node({x=pos.x,y=pos.y,z=pos.z-1})
        end
        if node6.name == "default:leaves" or node6.name == "default:jungleleaves" then
            minetest.remove_node({x=pos.x,y=pos.y,z=pos.z+1})
        end
end

minetest.register_node(":default:tree", {
    description = "Tree",
    tiles = {"default_tree_top.png", "default_tree_top.png", "default_tree.png"},
    groups = {tree=1,choppy=2,oddly_breakable_by_hand=1,flammable=2},
    sounds = default.node_sound_wood_defaults(),
})

minetest.register_node(":default:leaves", {
    description = "Leaves",
    drawtype = "allfaces_optional",
    visual_scale = 1.3,
    tiles = {"default_leaves.png"},
    paramtype = "light",
    groups = {snappy=3, leafdecay=3, flammable=2, leaves=1},
    drop = {
        max_items = 1,
        items = {
            {
                -- player will get sapling with 1/20 chance
                items = {'default:sapling'},
                rarity = 20,
            },
            {
                -- player will get leaves only if he get no saplings,
                -- this is because max_items is 1
                items = {'default:leaves'},
            }
        }
    },
    sounds = default.node_sound_leaves_defaults(),
    after_destruct = function(remove_leaves)
    end,
})