Basketball 13 team, one court, how to arrange it after 7 days?

Divide into three groups! A B C A Team Four, B Team Four, C Team Five! Each group will be promoted to 2 places, win one game and get 2 points, lose one game 1 point, abstain from 0 points and then play the elimination system! ! If you lose, you are finished. If you win, you will be promoted! ! The first game is divided into two games in 40 minutes! Don't play four quarters! Take a break for 3 to 5 minutes! ! Stop the watch system in the last 5 minutes! Every game/kloc-play the second game in 0/0 minutes! ! I hope I can help you.