I want to have an abyss which can be crossed by jumping in several separate bricks but that bricks are not visible until Mario stands on the edge and once Mario is there, the first brick appears and after 2 seconds the second one appears and one second after the second brick appears the first one disappears and so on and after two second since the last brick appears the first one should appears again, I don't know if i explained well what i want to get and if there is a way to do it

Look at level 5-C, it has the effect you are looking for (timed chain activators)
_________________________

Thank you gridatttack but that's not the effect that i want to get

I am using an sprite 168 to activate an sprite 167 which activates other three sprites 167, if i use other sprite 168 to deactivate the first sprite 167 that active three sprites 167, Will be also the three sprites 167 deactivated when the sprite 167 which active them is deactivated?