Please Help, Forced Choice Task

Hello,

I am very new to SuperLab and am trying to create the following experiment. We are presenting participants with 3 audio clips and would like them to select which one they believe is different. There are a total of 30 trials. I have tried multiple ways of setting up the experiment, but seem to be doing something wrong. Please help, data needs to be collected for student projects immediately.

Thank you,

Lisa