You can change the JBL Pulse lightshow via JBL Portable app.

1. Connect the Pulse with your phone, open the JBL Portable app and wait for app to recognize your speaker.  
2. Click the Lightshow button to enter the lightshow set-up
3. Swipe left and right to change lightshow
4. Swipe to customized page, to select your favorite pattern and customize your lightshow
5. Click the color wheel to change color or enter camera color picker
6. Click the brightness button to adjust brightness of the lightshow