How can I make a Sprite move within a scene?

Requirements:

1.Automatically bounce back when it reaches the edge.

2.Only the X coordinate changes, while the Y coordinate remains unchanged.

Currently, the movement only happens when I press a key on the keyboard. However, I want the movement to occur automatically. Can someone provide suggestions? Thank you very much!

every x seconds → set sprite.X to sprite.X +(whatever number you want)