Modified elasticsearch.yml - now Elasticsearch will not start

Brand new to Elasticsearch. Running it on AWS. I modified elasticsearch.yml per a YouTube video and now Elasticsearch will not start with this output:

[root@ip-xxx-xx-x-xxx elasticsearch]# service elasticsearch start
Starting elasticsearch:                                    [  OK  ]
[root@ip-xxx-xx-x-xxx  elasticsearch]# {1.7.2}: Setup Failed ...
- SettingsException[Failed to load settings from [file:/etc/elasticsearch/elasticsearch.yml]]
        ScannerException[while scanning a simple key; could not found expected ':';  in 'reader', line 18, column 1:
    cd ES_HOME/config
    ^]
org.elasticsearch.common.settings.SettingsException: Failed to load settings from [file:/etc/elasticsearch/elasticsearch.yml]
        at org.elasticsearch.common.settings.ImmutableSettings$Builder.loadFromStream(ImmutableSettings.java:985)
        at org.elasticsearch.common.settings.ImmutableSettings$Builder.loadFromUrl(ImmutableSettings.java:969)
        at org.elasticsearch.node.internal.InternalSettingsPreparer.prepareSettings(InternalSettingsPreparer.java:110)
        at org.elasticsearch.bootstrap.Bootstrap.initialSettings(Bootstrap.java:144)
        at org.elasticsearch.bootstrap.Bootstrap.main(Bootstrap.java:215)
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:32)
Caused by: while scanning a simple key
 in 'reader', line 17, column 1:
    cd /etc/elasticsearch
    ^
could not found expected ':'
 in 'reader', line 18, column 1:
    cd ES_HOME/config
    ^

        at org.elasticsearch.common.jackson.dataformat.yaml.snakeyaml.scanner.ScannerImpl.stalePossibleSimpleKeys(ScannerImpl.java:465)
        at org.elasticsearch.common.jackson.dataformat.yaml.snakeyaml.scanner.ScannerImpl.needMoreTokens(ScannerImpl.java:280)
        at org.elasticsearch.common.jackson.dataformat.yaml.snakeyaml.scanner.ScannerImpl.checkToken(ScannerImpl.java:225)
        at org.elasticsearch.common.jackson.dataformat.yaml.snakeyaml.parser.ParserImpl$ParseBlockMappingKey.produce(ParserImpl.java:558)
        at org.elasticsearch.common.jackson.dataformat.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:158)
        at org.elasticsearch.common.jackson.dataformat.yaml.snakeyaml.parser.ParserImpl.getEvent(ParserImpl.java:168)
        at org.elasticsearch.common.jackson.dataformat.yaml.YAMLParser.nextToken(YAMLParser.java:331)
        at org.elasticsearch.common.xcontent.json.JsonXContentParser.nextToken(JsonXContentParser.java:51)
        at org.elasticsearch.common.settings.loader.XContentSettingsLoader.serializeObject(XContentSettingsLoader.java:91)
        at org.elasticsearch.common.settings.loader.XContentSettingsLoader.load(XContentSettingsLoader.java:68)
        at org.elasticsearch.common.settings.loader.XContentSettingsLoader.load(XContentSettingsLoader.java:46)
        at org.elasticsearch.common.settings.loader.YamlSettingsLoader.load(YamlSettingsLoader.java:46)
        at org.elasticsearch.common.settings.ImmutableSettings$Builder.loadFromStream(ImmutableSettings.java:982)
        ... 5 more

Your elasticsearch.yml file is incorrect.

Post your yml file