5200 REM <CTRL-M><CTRL-M>SLIDE WHISTLE<CTRL-M>=============
5300 COL$ = "::::::::::::::::::::::::::::::::::::::::": FOR I = 1 TO 23: VTAB I: HTAB 1: PRINT COL$;: NEXT : PRINT LEFT$(COL$,39);: POKE 2039, ASC(":") +128
5400 LE = 4: FOR PI = 254 TO 1 STEP -2: POKE 0,255 -PI: POKE 1,LE: CALL 771: NEXT
5500 FOR PI = 1 TO 50: POKE 0,255 -PI *5: POKE 1,LE: CALL 771: NEXT : GOTO 700
5600 REM <CTRL-M><CTRL-M>MYSTERY SONG<CTRL-M>============
5700 HOME : PRINT "MYSTERY SONG!": PRINT "------------": PRINT : PRINT "THIS SONG HAS BEEN COMPRESSED. EACH TIMEIT IS PLAYED, THE NOTES GET LONGER. SEE HOW FAST YOU CAN NAME THE SONG."