Rocket flying

I made this by:
1.Open up on photoshop, click on windows then make sure timeline is clicked.
2.Click on duplicate frame button x6 

 this is the duplicate frame button

3. Click on each frame and hide what part you don't want showing in the fram such as in the first frame I only had 3 and the rocket layer showing.
4.Speed up time to 0.2
5.Click on 'Tween' which will add frames in and make the rocket move upwards for you. 

 This is the Tween button 

6.On tween settings add frames to 9, keep everything else the same.
7.Make sure it's on forever looped.
8. Save for web!