Jamstudio is really an awesome website for music composition. Just set the chard pattern let (Am – GM – FM – EM), by the way its for the song bhulado bhulado, now choose the options in lower box, let you wanna play guitar, drums and base(first three options). Click on loop page for it to play in loop and now set the tempo on left and hit play button.
Check out here mah composition of bhulado by jal.
Here is login and password, I got it from BugMeNot
firstname.lastname@example.org(log in) crosss(password).