10 bpm=120:bpb=4
20 sleep=50*60/bpm
30 counter=0
40 every sleep gosub 100
50 goto 50
100 print counter+1;" ";
110 if counter=0 then print ">TICK<":sound 1,60,10,15 else print " tick ":sound 1,119,10
120 counter=counter+1
130 if counter=bpb then counter=0
140 return