Christmas Tree Patterned Swiss Roll Cake

Swiss roll or cream roll is a kind of sponge cake roll stuffed with either whipped cream,fruits or buttercream or sometimes simply with jam. A thin layer of batter prepared with flour,eggs and sugar baked in a sheet pan, spread with jam or buttercream, rolled up and served as round slices makes this roll. I have prepared this roll with usual measurements as christmas tree Patterned Swiss roll,