I am looking for the title and the lyrics to a song I heard when I was a child. My grandmother and I used to sing it for hours! I want to find the song and give it to her as a gift.

Although I am sure out of order, these are the lines I remember:
He said sing slowly, he said sing slowly, he said sing slowly is what he sad.
He said sing faster, he said sing faster, he said sing faster is what he sad.
He said sing louder, he said sing louder, he said sing louder is what he sad.
He said sing softer, he said sing softer, he said sing softer is what he sad.

The song would speed up, slow down, get louder, etc. Thanks in advance for your help. I know the song will put a smile on my old grandma's face.