1. Open the action (for that go to: Window / Actions, click on menu icon at the right and choose in list “Load Actions…” then find the action on your computer and open it; 2. Open your background image; 3. Find action in the action list and open it and click play 4. Wait a few seconds that Photoshop make all actions (speed of action work depends of the power of your computer); 5. Then change the colors and Effects if you need 6. Ready! just save.