What should I do to get it done that way

Ok my hair is naturally blonde and I dye it live xxl cyber purple... but have gone exactly the colour you want. Its not easy and will cost about ten pounds and takes 2 days. 1st way. Use live xxl absolute platinum. Leave on for 1 hour. Don't be allarmed because what WILL happen is ull get whitey grey result with yellow stripes. This is just the purple coming out. Do it before bed. Leave a conditioner on overnight. Early next morn dye with any chocolate brown. Stay away from mahoganys which have similar red tones. Id recommend leaving the brown for a week then use a highlight kit or bleach to dye the top section. 2nd way is to strip using peroxide powder and developer then dye half brown and use an ash or beige blonde on top section to combat the brassiness. Look on the boxes some will say no brassy tones. Id go with the 1st way. Good luck