Interface with 3 buttons

Hello,
i need to have an interface with 3 buttons, each button redirect user to a new step after a parrallel AND gateway in my process.
what should i do in the first interface? i think i must do something on buttons ?

Thanks.

Put three different buttons on your interface and a different output for each one, for example, you have three contracts in your process, all in boolean format, each button modifies the value of one of these contracts, and according to the modified contract the Your process goes by a certain path

thanks for your reply,

Please, what do you mean by contracts?

Contracts are the ways you connect the process to the UI Designer. Do you Skype We could talk there would be faster communication