How to Play the music in regular time

Hi, guys! I'm a newbie of MAX. I want to create a music player. There are two music. When the first music is played 2 minutes, it will stop automatically. Then the second music will play 1 minutes. This will be a loop until I press the stop button. I try to use the "clock" , but I didn't find any solution to solve this problem. I think there may be need a math formula.

Does anyone know what objects i can use to do this?

Thanks a lot in advance,

Greetings!