Life expectancy of the particle in ticks (default 80). Is automatically
counted down; when reaching 0 or manually set to 0, the particle is removed.
If the lifespan of a particle is set to a value smaller than a frame cycle,
like 0.01, the particle will live for just one frame cycle.
0 .. unlimited (default: 80)
lifespan, x,y,z, vel_x, gravity, size, alpha, red,green,blue, bmap, BRIGHT, TRANSLUCENT, MOVE, STREAK, event, skills, effect