Atom Heart Beef...Pink Floyd have done that "same five notes" thing in some of their classics too:

Dogs: Who was blah blah blah,
Who was blah blah blah
Who was blah blah blah

Dark Side: All that you Blah,
and all that you blah,
all that you blah,
and all you blah.

Repetition can be powerful. Some of the most powerful speaches of all time use repetition:

"I have a dream" Luther King.
"we will fight them on the beaches" Churchill

"just thought you'd like to know"

__________________
Only the very safe,
Can talk about wrong and right.
Of those that are forced to choose,
There's some who will choose to fight.