Draw the design you would like to make on a piece of paper. Transfer the design to foam board and cut out the pieces. It is helpful to construct a 3D version of your centerpiece before you make it from chocolate. You can make any design and any size you like. My centerpiece design included a large moon with a flame and other flame pieces. Then I made a total of 4 thin single flames and 4 thick double flame pieces. The tallest flames I made were about 28 inches long with 3 progressively shorter flames. Trace the foam board design onto the rubber mat and cut out the moon design to make the template. Repeat to make the flame designs.
Make the moon design and the flames in dark chocolate: Place the rubber mat moon design cut out on a parchment paper lined surface. Use a ladle to fill the cut out with chocolate. Allow the chocolate to set. When the chocolate has set, peel away the mat. Repeat to make other flame pieces.
Make a base: Use flexible aluminum strips or cake ring to form a base. The base I made was 10 inches in diameter. Place it on a parchment paper lined surface. Pour tempered dark chocolate inside the ring to form a 3/8inchthick layer. When the chocolate has set, remove the ring and peel off the parchment paper.
Make the chocolate plate: Use an offset spatula to spread a 1/4inchthick layer of tempered dark chocolate over a 10inch sheet of acetate. Let the chocolate set slightly. Use a paring knife to trace around an 8inch cake circle. When the chocolate is set, peel off the acetate.
Make the white chocolate moon design and the thin flames: Use the templates for the moon and flames as a guide and draw slightly thinner versions of these things onto acetate. Cut out the acetate pieces. Use an offset spatula to spread a 1/4inchthick layer of white chocolate over the acetate pieces. When the chocolate has set, remove acetate from the chocolate piece and place each one on top of its existing dark version. Use tempered chocolate to glue each 1 into place. Use an airbursh to paint the white chocolate pieces red.
Make the chocolate flowers: Each flower consists of about 13 or more petals. Some petals are about 3inches long while others are about 4 inches long. I used a lot of flower petals so I made my own petal templates. To do this, I drew the shape of the petal at 1 end of a piece of plastic (like plastic from the side of a bucket) that was about 10 inches long and 5 inches wide. Repeat to draw as many petals as will fit on the plastic. Use an Xacto knife to cut out the petals. Repeat to make another template for the 3inch petals. Place the template on a piece of parchment paper. Use an offset spatula to spread a 1/8inchthick layer of tempered white chocolate over the template. Let the chocolate set slightly. Lift the template from the chocolate. Place the parchment paper over a rolling pin to give the petals a slight curve. You will need petals of varying degrees of curves. Make as many petals as you will need to make as many flowers as your design requires.