08

//from processing's exsamples

float [][] distances;
float maxDistance;

size(400,400);
background(0);
maxDistance = dist(width/2, height/2, width, height);
distances=new float[width][height];
for(int i =0; i < height; i ++){
for(int j =0; j < width; j ++){
float dist = dist(width/2, height/2, j, i);
distances[j][i] = dist/maxDistance * 255;
}
}

for(int i = 0; i < height; i +=2){
for(int j = 0; j < width; j += 2){
stroke(distances[j][i]);
point(j,i);
}
}