How to change ongoing track without unlocking screen on android phone

Follow the below given steps to change tracks

·        1)        Start music player(do not needed if you are already hearing a track)

·         2)  Press the lock screen button of your phone(it is usually above the phone)

·         3)  Then again press the lock screen button, you will find your phone locked,also a track wizard above the lock wizard

·         4)  Just click on tha track wizard, a playing window will appear below it

·         It has backward,pause and forward option

·         5)  To change the track,click next(forward) button and quickly release it

·         6)  To fast forward the track,click next(forward) button and do not release uptil required time of track is not achieved

·         7)  Same thing can be done to reverse the track