Sparks are fuzzy particles. Generate particles through the built-in CC Particle World or third-party plugins like Trapcode Particular You adjust their movement, and then smear them through blur or DOF, for example. There are a lot of tutorials on your receiver.
You can do flashes by interleaving the color correction and animation of the usual solid layers, and for a change throw in some Optical Flares. Although you can find similar presets, e.g. Light Leaks Dissolve .
You can do flashes by interleaving the color correction and animation of the usual solid layers, and for a change throw in some Optical Flares. Although you can find similar presets, e.g. Light Leaks Dissolve .