How do I flip a specific number of frames to the other side of the canvas?

I’m making an animation in Harmony, and I would like a certain number of frames to repeat, except on the opposite side of the canvas, and flipped horizontally. Whenever I try this, keyframes pop up and make it impossible unless you want to make the first part of the animation slowly transition to the other side, which is what I do not want. Is there any way to do this properly in-software? Thanks, and sorry if this is a silly question. :]

Use a stop-motion keyframe to do this and it will abruptly transition instead
of slowly interpolating to the flip.

Thank you! I’ll try it out!