Earlier today, i was messing with events and using relays, and came across a way to make the bricks look and seem like holograms, so i thought i'd make a video tutorial for it :D
Video tutorial (You can watch this in HD to see better)
http://www.youtube.com/watch?v=VqaqB1kKcKUText tutorial
Use the wrench on a brick, and disable Ray Casting and Collision, this is optional, then go to the Events menu and put this in
[ON] onActivate - Self - fireRelay
[ON] onRelay - Self - fireRelay
[ON] onRelay - setColor - Any solid color
[OFF] onRelay - setColor - Any transparent color, i suggest trans white or black
[ON] onRelay - Self - toggleEventEnabled 2 3