Rub in the margarine with flour until it forms a sandy texture.

Add the sugar until it well incorporates.

Add the beaten eggs and stir thoroughly by use of a wooden spoon.

Now preheat the oven.

Separate the mixture into two.

One of the mixture add cocoa until the mixture browns and the other one add vanilla essence.

Grease the tins and dust with flour.

Now using a tea spoon gently place the both mixture to your own design.

Place the mixtures in the oven and bake.