how to create abstract background in photoshop

First Open A New Document .

Now Create A New layer by Cliking Ctrl+Shift+N

 Make Sure That Foreground Color is White and Background color is Black.now select Gradient tool and Drag by holding Shift rom down to upwards.

Now Goto Filter>Distort>Wave and follow Given Settings.

now goto Filter>Distort>PolarCoordinates

After applying PolarCoordinates Effect 

Now Goto Image>Adjustments>Hue/saturation
Follow The Given settings.

Final Result: