I've done this.
You need to make a stack on bricks. Use four 1x1F's in front, then one 2x4F, and a 1x4F behind the 1x1F's and on top of the 2x4F. Do that about six times. Then on the 1x1F's, add this event:
[X] 0 [0] onRelay > Self > fakeKillBrick > (See Below)
The X and Y may need to be changed depending on how you build this, the Z should be zero, and the time can be anything above 3. Below that just looks bad.
Okay, now on the bottom 2x4F, name the brick Brick_Emitter_Start
Add this event to all non-1x1F's:
[X] 0 [50] onRelay > Self > fireRelayUp
On the brick you want to use to trigger the brick emitter, use this event:
[X] 0 [0] onInput* > <NAMED BRICK> [Brick_Emitter_Start] > fireRelay
*For the onInput, any input may be used.