This type of firework sends a fan of effects in to the sky
It is critical to position these fireworks correctly to your audience, please check the label on your fireworks, any label stating "this side to audience" or similar should be followed, see diagram below.
This type fires whole rows simultaneously into the sky repeating throughout the firework
This type fires sequences tracing left to right (some fire sequences and standard fan as a mixture)
(images supplied by Men Shun but apply equally to all manufacturers fan types)