Starting with the mode Shur (tonic G), I heavily steblized the mode as it used to be performed at the Qajar era. then after few minutes I modulated it to its forth creating another Shur on that degree(C), then by altering the fifth it suddenly charges up to the Seventh, creating the mode Mahoor (on F), a powerfull and surprising climax. then I steblized Mahoor (and Raak) for about a mitune, and back again to the forth, but this time I played in Nava air instead of Shur (on C), using the tetrachord Neyriz I did a easy modulation back to the shur (G) and end it up.