The function word 罢了
The function word 罢了 
is used at the end of a declarative sentence. It is used in spoken language.
is used at the end of a declarative sentence. It is used in spoken language. Pay attention
It often has a negative connotation.
Examples
我开个玩笑罢了
I was just kidding!
wǒ kāi ge wánxiào bàle
Pay attention
The speaker doesn't regret the joke.
Examples
这只是个提议罢了
It's just a suggestion, that's all
zhè zhǐ shì ge tíyì bàle
Pay attention
The speaker is not going to perform the action he is talking about.
罢了 also has the meaning “enough”. In this case, it is placed at the beginning of a sentence and is followed by a comma.
Examples
罢了，我再也不想跟你说话
Well, I don't want to talk to you anymore
bàle, wǒ zài yě bù xiǎng gēn nǐ shuō huà
罢了，这部电影太恐怖了
That's enough. This movie is too scary
bàle, zhè bù diànyǐng tài kǒngbù le