When I was in kindergarten at the age of 3 or 4, a boy was bothering me while I was playing in the sandpit. He was throwing sand at me and saying bad words to me and my friends. I tried to avoid him, but he did not stop. My older brother saw this and told the boy to leave me alone, but the boy did not stop and pushed me. My brother got very upset and shouted at him, “You don't touch my sister again, not even with the petal of a rose" and they started fighting. They chased each other until they got to the staircase. My brother pushed the boy, who rolled down the stairs and hurt his head; he ended up in the hospital and our parents had to pay his bill. The boy never bothered me again, and my brother taught me to fight.
Remember, in English you can't separate two complete sentences with a comma; it's called a comma splice and is ungrammatical.