Sequence generator pro focus and alignment looping

[Jezphil]

Basic question here but I can't solve it... I know how to set up sequences in SGP and set them running. However, I want to set the CCD camera looping one or two second images and not saving them so I can check framing and Bhatinov mask focusing. I can't figure out how to do this without setting up a sequence, but there must be a way surely? What am I missing please? Thanks in advance.