on those lines vs in those lines

[Daemon99]

1) Why don't you try to do like that?
2) Why don't you try to do something on those lines?
3) Why don't you try to do something in those lines?

Can someone please tell me if the above three sentences are natural and mean the same thing? Can I omit something in sentences #2 and 3?
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Non-native speaker of English
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I intend to live forever - so far, so good.

[Kitosdad]

Morning Daemon.

2) Why don't you try to do something on those lines?................ I would use this, and something shouldn't be left out for it to make any sense.

1) Is grammatically incorrect......... it does need "something."

3)You cannot do something "in those lines."

You can do something along those lines.
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Keep it simple ... Keep it interesting.

[Daemon99]

Thanks a lot, Bill! That sure helps.
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Non-native speaker of English
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I intend to live forever - so far, so good.