I Was Yellow Today

I'd rather be yellow than red; sometimes I am orange instead. We're speaking of blood pressure here. Too much red and death is near. Doc said my pressure was too high, and I must check it every day. I bought a monitor to try, and let the chips fall where they may. Three times per day I turn it on, and this mainly what I've seen: The mystery of the thing is gone, and very seldom am I green. If I could only figure out why sometimes pressure is so high, I'd be a millionaire, no doubt, and think of all the things I'd buy!