Pause for a specified amount of time
If set to the name of a timebase, the expiration time will be measured relative to that timebase. If omitted, the current time will be used as the timebase.
Allowed at top level:
Block, Conditionally Execute Actions (if), List, Protocol, Render Actions, Repeat Actions (while), Schedule Actions, Task System State, Trial, Unconditionally Execute Actions (else), Variable
Update Stimulus Display
Wait for Condition