Do you have blond hair? Apply chamomile tea or lemon juice and dry it in the sun or with a blow dryer this way your hair will become really nice.
Need blond hair? Then you have to buy expensive hair dye or you can make chamomile tea. Then wash your hair with it. If you've done everything in your hair wash out.
You simply wash every day until you have the color which you wanted.
(the same can also do this with lemon juice)