need some tips

So I'm making this game where you move by touching the screen but I also want you to switch places if you have one finger on the screen and then tap with a second finger however I don't want the player to switch with every tap or two taps just if one finger is one screen and they tap with the other
is this hard to do
can someone give me some tips?

 

• Design
  • Touch controls shouldn't be confusing for the player. Be careful of designing controls that can be activated by mistake. Consider adding a graphical animation around the touch that changes to signify that the secondary action is about to be activated.

• Implementation
  • It isn't hard, but it will not be easy for someone unfamiliar with programming.
  • What you want can be done with the Input class.