on purpose (deliberately) <—> by accident (accidentally)

On purpose is used when someone deliberately does something that is bad or unfair.

By accident is used when someone does something accidentally, or without intention.

Eg:

A: Did you see the crash in that car race yesterday? I heard that the driver was penalized for driving into his rival on purpose.

B: It looked like he did it on purpose, but I think he drove into him by accident. It was raining, so it was difficult for him to see in front of him.

A: No, he definitely did it on purpose! He is always crashing into his rivals!

Can you make a sentence using “on purpose” or “by accident”?