p	Position
d	Direction
q	Cycle
b	Target
S	i
C	j
H	k
I	element
e	x
R	y
K	bpp
E	run_loop
w	w
h	h
G	current_time
u	next_time
t	pixel
s	flags
P	Palette
n	event
v	video_info
o	screen
O	Rand
g	Approach
r	RENDER
i	Sint32
z	tx
x	minv
y	maxv
x	min
y	max
x	argc
y	argv
A	TRAIL_SIZE
B	SWARM_SIZE
m	a ## b ## c
c	SDL_MapRGB ...