sorry i didnt take pictures but its really easy

1) decide where in your hair you want your rainbow.hold the total ammount of hair you'd like to make the rainbow and tie the rest out of the way...sorry that doesnt make any sense:(

2)seperate the hair into 7 equal pieces(AKA one piece of hair for each colour)

3)mix the first colour(red) with conditioner.(one part powder,one part conditioner.ammounts differ depending on how big your rainbow's gonna be.)
*my friend bought the colours at an indian spice shop SUPER cheap. only R5 per colour

4)apply the colour to the first strand

5)we didnt do this but you should wrap each colour in tin foil so the colours dont mix

repeat steps 3 & 4 for each colour

5) leave in for about half an hour(mine was only in for about 10 minutes cause it was like 2 in the morning an we were getting tired)

6)rinse each colour seperately

enjoy your rainbow :)