Polyphony is normally isolated into two primary composes: imitative and non-imitative. Either the different melodic lines in a polyphonic entry may sound like each other, or they might be totally autonomous in their beat and contour.In music, impersonation is the redundancy of a song in a polyphonic surface soon after its first appearance in an alternate voice. The song may fluctuate through transposition, reversal, or something else, however hold its unique character.
So all you have to do is look around your house and see what texture you can see and what things feel rough. Or if it feels smooth, soft, hard, light or heavy then that is what you write.