doesn't matter

is it you?....No...
is it me?...No..
or ....it's them?... No..
.............................
I know.... it's us....
No... no... no....
...........................
so who is it???!
.................
I don't know who or what it is.. but what I really know
when I see it... it's calm me down
when I see it... it's so peace in me..
...........
so.... what is it?