Spiral rainbow

B flat or B sharp

be flat
I know, I know – this I might regret
maybe the worst instruction I ever will get
then rather be sharp
and to get out from under the tarp
and dare to play that self built harp
yes, I think I really prefer it – be sharp!
and most of us know this is actually C
quite a simple key
to play in easily
and why do I still fail to see
keep it simple is a simple way to be free