Build: Dueling Tree Target Practice

Want to practice shooting targets with a friend?  Here's a build of a dueling tree for LEGO Mindstorms Robot Inventor.

It features two starting targets on opposite sides.  When a target gets hit, the corresponding motor's position changes by a few degrees, and this make it switch to the other side.  The objective of the game is to hit all targets on your side and whoever has no targets left first wins!

The hub counts you down with its lights and sounds before shooting.  And when one player wins, you see it written on the hub and also hear a cheer.