Chefでlogを出力したい

Chefに関しては初心者なのですが、
試しに「Hello all World」とlogを表示させたいと考えています。

###前提・実現したいこと
Chefのnodesとrolesとenvironmentsの機能を使い、それぞれをrecipesで実行したいと考えています。
nodesは「Hello」,rolesは「all」,environmentsは「World」の値を管理しており、recipesのlogで出力するプログラムです。
nodesとrolesとenvironmentsとrecipesの4つのjson,Rubyファイルですが、

log[Hello] action write
log[all] action write
log[World] action write

と結果を表示したいのですが、environmentsのところでエラーが出力してできません
解決方法をどうかお願いします

###エラーメッセージ
$ sudo chef-solo -c chef-repo/solo.rb -j chef-repo/nodes/Hello.json
Starting Chef Client, version 12.16.42
resolving cookbooks for run list: ["hello"]
Synchronizing Cookbooks:
hello (0.1.0)
Installing Cookbook Gems:
Compiling Cookbooks...

Recipe Compile Error in /Users/name/chef-repo/local-mode-cache/cache/cookbooks/hello/recipes/default.rb

ArgumentError
You must supply a name when declaring a log resource

Cookbook Trace:
/Users/name/chef-repo/local-mode-cache/cache/cookbooks/hello/recipes/default.rb:11:in `from_file'

Relevant File Content:
/Users/name/chef-repo/local-mode-cache/cache/cookbooks/hello/recipes/default.rb:

9: log node[:Hello][:start]
10: log node[:Hello][:next]
11>> log node[:Hello][:last]
12:

Platform:
x86_64-darwin15

Running handlers:
[2016-11-20T01:10:11+09:00] ERROR: Running exception handlers
Running handlers complete
[2016-11-20T01:10:11+09:00] ERROR: Exception handlers complete
Chef Client failed. 0 resources updated in 04 seconds
[2016-11-20T01:10:11+09:00] FATAL: Stacktrace dumped to /Users/name/chef-repo/local-mode-cache/cache/chef-stacktrace.out
[2016-11-20T01:10:11+09:00] FATAL: Please provide the contents of the stacktrace.out file if you file a bug report
[2016-11-20T01:10:11+09:00] ERROR: You must supply a name when declaring a log resource
[2016-11-20T01:10:11+09:00] FATAL: Chef::Exceptions::ChildConvergeError: Chef run process exited unsuccessfully (exit code 1)

###該当のソースコード

Ruby
1# chef-repo/nodes/Hello.json
2{
3  "environment": "hello",
4  "Hello": {
5      "start": "Hello"
6  },
7  "run_list": [
8    "recipe[hello]",
9    "role[hello]"
10  ]
11}
12
13# chef-repo/roles/Hello.json
14{
15    "name": "hello",
16    "description": "all",
17    "chef_type": "role",
18    "json_class": "Chef::Role",
19    "default_attributes": {
20    },
21    "override_attributes": {
22      "Hello": {
23        "next": "all"
24      }
25    }
26}
27
28# chef-repo/environments/Hello.json
29{
30    "name": "hello",
31    "description": "World",
32    "chef_type": "environment",
33    "json_class": "Chef::Environment",
34    "default_attributes": {
35    },
36    "override_attributes": {
37      "Hello": {
38        "last": "World"
39      }
40    }
41}
42
43#chef-repo/site-cookbooks/hello/recipes/default.rb
44
45log node[:Hello][:start]
46log node[:Hello][:next]
47log node[:Hello][:last]
48