While growing up, there was a boy named John who came from a poor background. His parents couldn't afford to give John the fancy things in life.
Despite his poor background, his parents sent him to school and encouraged him to study hard. John was serious with his studies and eventually became a doctor.
He got a good job and room care of his parents and gave them wonderful things in life. Then he remembered a saying that "whoever wants to sit under a tree tomorrow should plant one today".
Explanation: Semicolon to seperate two independent clauses that could act like stand-alone scentences, and commas on either side of "however" due to it being a transition