What elements could be used in compounds to make a firework that produces green and red sparks and finished with a blue smoke?

To create green sparks in a firework, barium compounds such as barium chloride or barium nitrate can be used. For red sparks, strontium compounds like strontium nitrate or strontium chloride are commonly employed. To produce blue smoke, copper compounds such as copper chloride or copper sulfate can be utilized. By carefully selecting and combining these elements in the firework composition, the desired colorful effects can be achieved.