How to dye your hair using Splat hair dye

In August i'm going to dye my hair green in August. But just the underneath and a few hilights on the side. Gonna look pimpin ahahahhaaaaaaaaaaaaaaaaahahahhahaahahahhhhhhhhhhhhhaaaaaaaaaaaaaahhhhhhhhhhhhhhhhhhhaaaaaaaaaaaaaaaahhhhhhhhhhhhhhhhaaaaaaaaaaaaaaaaaaaahhhhhhhhhhhahaaaaaaaaaaaaaaaaaaaaaaaaahahahahahahahahahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa