Or do this to entertain yourself and annoy your workmates:
Play music on your phone:
Mister Sandman
42 6 2
6 62 6
America
556159
008084
8424
Strangers In The Night
48848
48684
Eye of the Tiger
6, 6 5 6, 6 5 6, 6 5 4
Ring Around A Rosy
888604
4888604
04044004
Old MacDonald Had A Farm
6667887
99004
466678
87
99004
444 4 4
444 4 4
444 444
44 444 4
Shave And A Haircut, Two Bits
9 4421 6 6
Way Down Upon The Swanee River
3 2 1321 0 45
6 842
3 2132
1 945
6 54224
When Johnny Comes Marching Home
8 44 4 48 6 86 5* 5*
8 4 44 48 686 9#5#
5 ### 59 99
5 66 6 4 888 48#9
6 8 44 4 404
Happy Birthday
4 4 2 4 # 8
1 1 2 1 98
Auld Lang Syne
8 444 6
8 4 8
9 1 4 3 9 #
Frere Jacques
12311231
369369
9#9631,
9#9631
191,191
Mary Had a Little Lamb
604066 6
22 2 66 6
604066 6
6 8 8 6 8 4
California Here I Come
88 8 8 9 8 1
3 3 3
3 6 34
Mary had a little lamb
3212333
222399
3212333
355931
Good Night, Ladies
9 7 44
9 7 22
9 7 00
9 66 5 54
6542336
558 336
6542336
6 55321
I've Been Working On The Railroad
7 2 4 5
4 2 6 4
Jingle Bells
6 66 666
6#786
9 9 9 995 5
55 5 7 4 5 6
She'll Be Comin' Round The Mountain
4 8
## # # 84
4 8 #
Three Blind Mice
6 8 4
6 8 4
9 5 5 4
9 5 5 4
Yankee Doodle
4 4 2 6 4 6 2
4 4 264 1
4 1 5 6
Chinease Song
333322 11 2
The Farmer In The Dell
4 4 4 4 4 4
5 6 6 6 6 6
# #9 # 84
4 6 6 8 8 4
Louie, Louie
111-66-999-66
Row, Row Row Your Boat
4 4 4 86
6 2 6 9 #
# ##
0 00
* **
4 44
6 2 2 1 1