Can't get the horizontal bar to work

Hello there. I was hoping the Axure community could help with this, please. I’m struggling to make the horizontal bar to work corresponding to the direction of the left and right directional chevron when the user clicks on them. It should go from left to right and right to left. I’ve managed to get the chevrons working but not the horizontal bar. I’ve attached the prototype for your perusal.accordion with scrolling card.rp (86.8 KB)

Thank you in advanced.