Preheat oven to 180 degree C. Line a 8 inch / 20 cm cake pan with parchment paper and oil the bottom and sides really well. Set aside.

Take flour, baking powder in a bowl and mix well. You can sieve this if you want.

Now take eggs, sugar, vanilla and pineapple essence in a bowl and use a beater to whip this till it is creamy and pale. it will take 4 to 5 mins.

Now add in oil and whip again.

Now add in half of the flour mix and fold gently. Add in entire milk and the remaining flour and fold gently.

Now divide the batter into two bowls. IN one bowl add black food colour and fold gently. You can divide this batter into 6 bowls if you want.

Divide the other bowl of batter into 6 small bowls.

Now add each food colour into each batter and mix gently. Set aside.

Now take the cake pan and start with any colour as you wish, pour it in the center, Now pour one portion of the black batter and continue this alternating the batter. You should add any coloured batter and then black batter..this is the order. CHECK THE STEP BY STEP IMAGES FOR CLEAR DETAIL.

Once you have done. Pop this in oven and bake for 45 mins or till a toothpick inserted comes out clean. Remove it from oven and cool it in tin for 15 mins. Now remove it from tin and cool it down completely.

Meanwhile prepare buttercream, check this link for details.

Now take the cake and slice the top dome portion off. Spread a thin layer of buttercream over the cake, this is called crumb coating. Stick the cake in fridge for 30 mins.

Once the cake is chilled. Spread remaining frosting on the cake and spread evenly on the top and sides. Now put it back in fridge for 1 hour.

While the cake is chilling, make the instant fondant. Mix icing sugar, milk and butter till it resembles coarse crumbs, now add in black food colour and mix well. Add more milk till it forms a smooth dough.

Now take this black fondant in parchment paper and sprinkle with some more icing sugar. Roll it into sheet and slice it in slices so it has one pointing edge and other is little wider.

Now decorate the cake with this so it resemble zebra stripes...CHECK THE STEP BY STEP IMAGES FOR CLEAR DETAIL.

Now slice the cake, admire it and devour it..