i am round or square and flat i have two or four holes . i am sold in the shop everyone, in the worid need me very much. when everyoe need me they buy me and tie me firmly. when i want to come into a hole , i must go into it slopingly. strongely enough after oming into a hole i am stik outside the hole... what am i...? aku kira kamu asalah sebuah kancing baju. i have a head but i don't have eyes or ears. i foam at the mounth but i never bite i roar , but i have no tongue. i lie in a bed but i have no back i rise , i fall i rush and run, but i have neither legsnor feet i was born in the mountains, but i go down to the ocean whenever i can. . i cahot keep still for a moment. i am as restlles as can be .. kamu sebuah sungai saya kira.you are a river i think.