just say "dark
green highlights only on the top left right side of my
hair"
groupon has $25 deals for highlight
but must top up for bleaching
might also need to top up for the green dye since it's not in
the normal range of colours
maybe end up about 60-70 bucks
u can DIY at under $20
buy bleach
buy the colour powder or cream
(i happen to have dark green powder for sale. PM if interested. if
not, dont waste my time)
go youtube see tutorials how to do it on ur own
btw, the colour will fade over time