I didn't think that would be hard..
Just a bit of basic programming..
on start of layout -
> set the timer for 3 seconds
> sprite set direction = 3
timer on timer > set timer for 3 seconds
-- sprite.direction = 3
> sprite set direction to 9
-- else
-- sprite.direction = 9
> sprite set direction = 3
It worked. But if you want you can answer a follow up question. How do you make the sprite move in one direction longer then the other?