# Activators

Activators are used to only allow specific events to check if a structure is complete.

### PLAYER\_BLOCK\_PLACE

Activates when a player places a block

### BLOCK\_PHYSICS

activates when blocks change due to their behaviour. (for example grass becoming dirt because a block was placed on top or the opposite, etc)

### PISTON

Activates when a block is pushed or retracted by a piston or the block is a piston that updates

### RESTONE

Activates when a lamp toggles etc

### LIQUID\_FLOW

Activates when liquid block updates

### BLOCK\_INTERACT

Activates when a player interacts with a block, for example right-clicks a note block

### INVENTORY\_CONFIRM

Activates when a chest/barrel/anything that has an inventory and is a block closes
