= 1#1 pixel BLACK
= 10#10 pixel BLACK
= 100#100 pixel BLACK
1
= 1#1 pixel WHITE
= 10#10 pixel WHITE
= 100#100 pixel WHITE
0
x+y=0
X/0= + infini = impossible ?
x = abscisee
y = ordonnees
-1 < 0/-X < O > 0/Y> 1
x+y=0
Y/0= - infini = impossible ?
