Step 1:
Create a new 200 x 200 pixel document, which is 72 dpi, RGB Color
mode, and has a White Background.
Step 2: Draw the base of your animation.
Step 3: Click Layer-New-Layer via Copy in the
menu bar or press command-j on the keyboard. You now have a new
layer, which is an exact copy of the previous layer.

Step 4: Add
to your image.
Step 5: Repeat step 3.
Step 6: Keep repeating steps 2 and 3 until you
finish your animation.
Step 7: Click File-Save for Web in the menu bar.
Step 8:
Check the Animation box.
