MIN_SIZE

MAX_SIZE

MIN_XVEL

MAX_XVEL

MIN_YVEL

MAX_YVEL

MIN_ALPHA

MAX_ALPHA

PARTICLES_PER_PIXEL

INITIAL_PARTICLES_PER_PIXEL

PARTICLE_R

PARTICLE_G

PARTICLE_B

CLICK_AMOUNT

MOUSE_VEL_FADE_SPEED

MOUSE_REPULSION

MAX_REPULSION_VEL

restart