How can I go back to my natural hair color?

I have been highlighting my hair for over probably about five or four years and I am really getting tired of the color. My natural hair color is a light golden brown and over the years I have highlighted it blond but still kept my natural hair color in there too. I just dont want so much blond like I have now and want to go back to my original hair color and maybe add just a few strands of blond in the front like that vicotiras secret model, allesandra. but.....i have (i know this is bad) hair bleach..not extremly strong..but how can i change back to my natural color. hopefully this process wont mean i have to wait until my hair grows out of it....

thanks