alligned is an internal object flag in ZZT-OOP. This flag is true for a given object whenever it is aligned horizontally or vertically with the player, and false otherwise.
Note that the flag name has two Ls: the correct spelling of the word aligned will check for a user-set flag instead.
This object prints a message when aligned with the player.
@object #cycle 1 :loop #if alligned signal /i#loop :signal "We're alligned!" /i/i/i#loop