I have a bedside digital alarm clock with big red illuminated numbers. It makes a nice night light, and it is a delight to be able to tell the time when I stir at night. Digital numerals can sometimes pass for letters. For instance 5 looks just like S, and 8 looks like B, and of course zero looks like O.
In the morning I am often amused to waken and find the clock sending out a distress message: S O S. That happens at five minutes past five am. It probably sends the same call for help in the PM, but I am at "early bird" supper, and never notice.
A few minutes later it begins to SOB; at 5:08 exactly. Later in the morning it will ask for BOB, whoever he is.(8:08)/ BOB may be his SIS (5:15) which would make her a SIB (5:18), sibling with a masculine name, Bobbie, perhaps.
If I stared at the clock the whole night through, I might find it spelling out other words too, but fortunately I usually drop off to sleep. Clock watching has the same effect as counting sheep.