How to create simple & cool wallpaper in Photoshop

i used two sowftware 1-Adobe Illustaratorfor Background creating 2-Adobe Photoshop Other Shortcut keys:- Illustarator: v-selelction tool a-direction tool i-i droper tool ctrl g-group selected object Ctrl N-new document/page Hold alt lleft click drag object drop object another place then unHold alt key for duplicate object Photoshop: V-move tool i-i droper tool m-Retangular Marquee tool w-Quick selection ctrl e-merge tool ctrl t-show transform tool Hold ctrl th