Rainbow cake recipe

First of all, I try this recipe with use steam not oven. Actually this is more easy and quick
Materials:
6 eggs
200 gr sugar
1/2 teaspoon emulsifier
1/2 teaspoon vanilli
1 spoon salt
125 gr wheat
5 spoon milk powder
175 ml oil
food coloring (red, blue, yellow, green, orange, and purple)

Direction:
~Beat eggs and sugar until white emulsifier enter again whipped until fluffy (hand mixer philip kurleb 25 minutes).
~After a thick mixture of flour tread insert and stir gently with a rubber spoon until blended. (I usually use the lowest speed of mixer)
~Pour oil mixture into the batter and stir well. (Stir with a rubber spoon from the bottom upwards until smooth)
~Divide the dough into 6 parts. Give each section by color: red, orange, yellow, green, blue and purple
~1 part steamed for 10 minutes (make sure cooked with prick tests)
~repeat one by one according to the color
~if it is cooked all, pile one by one and apply a cream or jelly as desired. (I added a little springkle on it)