Flatten out a piece of clay in your hand and place on your wall. Use a comfortable length of dowel as a 'rolling pin' to spread the clay to your required thickness and then with the edge of your craft knife, mark your brick shapes/pattern.
When happy with the amount of brick and their look, glue the beams and clay in place. Leave the clamps in place for about an hour for the wood glue to dry.
Whilst the glue is drying, mix up your stucco, as it takes an hour to stand before use. We used Art Mache by Artstraws and a 1kg bag goes a verrrry long way!