Arachne believed that she was the best at spinning and weaving and that is what she told the people in her town. Until one day someone asked if the god Athena taught her, she laughed in his face.
Then the god Athena appeared from the sky and challenged Arachne to see who was the better spinner and that the loser would have to stop spinning and weaving for the rest of their life. Arachne foolishly accepted.
After the challenge was done and Arachne lost she fell to her knees and wept, feeling sympathy for the girl Athena turned Arachne into a spider so that would be able to spin webs for the rest of her life.