i remember programing my 16K zx spectrum (now thats old school)
to show a clock face
LOL i had a look about the web and found the actual prog i used
10 REM First we draw the clock face
20 FOR n=1 TO 12
30 PRINT AT 10-10*COS (n/6*PI),16+10*SIN (n/6*PI);n
40 NEXT n
50 REM Now we start the clock
60 FOR t=0 TO 200000: REM t is the time in seconds
70 LET a=t/30*PI: REM a is the angle of the second hand in radians
80 LET sx=80*SIN a: LET sy=80*COS a
200 PLOT 128,88: DRAW OVER 1;sx,sy: REM draw second hand
210 PAUSE 42
220 PLOT 128,88: DRAW OVER 1;sx,sy: REM erase second hand
400 NEXT t