The Lift is a block that teleports a player along the y axis of a dimension when given power. After being placed and given power, a player standing on a lift will be teleported to the next solid block that is below the lift in the y axis.
When activated a harmless laser will constantly shoot down from the lift to the block it will be teleporting players to and from. This laser is originally green.
Sending a redstone signal to the lift changes its orientation, teleporting players up to it. When this is done the laser will turn yellow as will the block texture. This will only work if there is enough room above the lift to teleport the player (2 free blocks).