player movement path

Hello friends and family,
I’m a beginner in UE4 and I am currently developing a runner game in a closed circle arena using the 3d side scroller blueprint, I can’t find a way to move my actor above the edge on a circular direction, every time I test the movement the character would fall of the edge, my aim is to make the movement restricted to left and right in a bow shape with the ground, can you guys please help me with blueprint?
I’m using UE 4.2. and I have used the blocking volume.