|Long Description||The sequencer prompt will not be returned until the state of the ALFOSC camera matches the state given as an argument. This is useful in scripts, for instance to execute commands when the camera is reading out. For multiple exposures, the command will wait until the state of the last exposure is matched. Caution: Do not use this command to catch camera states that is expected to last only a short time (less than around 1 second). The state change may not be detected by the command, and the sequencer prompt may never be returned. Please note that waiting for the state to be 'readout' before an exposure is started will result in the command waiting forever.