Pyrotechnics involve the controlled, exothermic combustion of carefully formulated chemical mixtures designed to generate light, heat, and sound. These devices rely on the principles of chemistry and solid-state thermodynamics, utilizing specific compounds as oxidizers, fuels, and color agents. The distinct colors observed in displays are achieved through the emission spectra of various metallic salts, where the high energy of the combustion excites the electrons in the metal atoms, causing them to fall back to a lower energy state and release photons of specific wavelengths. The structural engineering of the device must manage the rapid expansion of gases to create directional force, while the choice of chemical composition determines the overall energy output and the duration of the light emission.