New new bullets style, with about  140 particles per bullets.

They are composed of several layers: 

• trail particles, a few per seconds. They will stay in place, shrink and go darker. Their lifetime is quite random
• The bullet color core. Particles spread over the 10 last positions of the bullet. The closer from the actual position, the more spread and the more particles. 4px wide
• The bullet white core, some logic as the color particles, but with less spread and less particles. 2px wide