BlockTrigger,0,BLOCK ID,URDL,EVENT,Active time,OPTION
When player touches any block of type BLOCK ID, activates EVENT. URDL determines what type of interaction the player must have with the block.
URDL = 1 = Player on top of block URDL = 2 = Player touching right side URDL = 3 = Player touching bottom URDL = 4 = Player touching left side 0 and 5 have an unknown interaction
This command supports the "once" OPTION, meaning if you enter "once" as the final parameter it will only activate once and then delete itself.
// Activate event #1000 when player lands on basic wood block (block ID 1) only once BlockTrigger,0,1,1,1000,0,once