Okay let's start simple, first I would suggest you make a palette with the colors you want you hair. This is mine,


Then grab your darkest color and do as shown. (Pay attention to if it's on the bottom, top , left, etc...)


Now that that's done, get the next darkest color and do as shown.





Now hopefully you have noticed a pattern. If not this is what you want to do keep getting slightly lighter colors and add it one down (Or up) until the sides, back, and top are completely filled in. When you are done this is what it should look like,


Then start to edit it to your liking this is what I did,


If your doing a girl the simply add a some bangs to make it look nicer!


Next just finish the face up and your DONE!


PLEASE! Tell me if this helped in the comments!