Paint the wall with decorative paint in the colour Carmine Red and let it dry. Then add a layer in the colour Snow White. This does not need to be neatly covered, you have to work quickly. Pull the still wet paint away with the window wiper, crisscross, some parts can overlap. For a big wall, do this in parts to prevent the paint from drying before applying the effect. Of course, other colour combinations are possible, be creative!