Use one button in app by mit inventor 2 to control two servos?

Hi, I've managed to turn 1 servo with both buttons that can send angle values to servos (45/90/135/180 degrees) and 1 slider. Also, multiple slider to multiple servos. But I don't know how to use one button to control two servos, also another two to control another group of servo.

I only know the very basic of coding through Arduino, and because I have no time learning writing an app, so the tool is limited to mit inventor 2. Therefore I don't know where to start. I'll attach the arduino code and tutorial I used. It'd be great if anyone could help. Thanks!

Here are the two tutorials i used

demo of problem.png