Hi.
Translate is doing the movement.
The 'move Speed' is a variable where you can set a value , the higher the value, the faster it will move.
and when negative it moves to the left and positive will move to the right.
'Get position' is getting the current world position and stores it in the 'Current pos' variable.
and the 'Reset Pos' you have to manually set as shown on the video.
You can find a sample scene of this on my
Playmaker Samples 1.1 asset
But you should be able to create your own, when you set a value manually on 'move Speed' and 'Reset Pos' and on the 'Set Position action x value.
instead of variables you can also just set a number but its easier to adjust on a exposed variable.