Writing a prog rock song

Knowing various scales is most important. The feat is knowing what to do with them. The improvisation in India is a healthy listen. You want to expose yourself to traditional ethnic music and sort of observe from a listening stand point, where all these musicians directing themselves. Zappa did this for years. I like to at least hear as much as I possibly can before I compose. No it is not good to worry all the time about things like, has my idea been written before? But you can educate yourself by listening to ancient music and exploring the improv tunnels that so many musicians have discovered. It's quite like a walk down the hall of Gnosis.