// http://forum.processing.org/topic/how-to-recreate

size(500, 500);
noLoop();
smooth(4);
noStroke();

background(#F00020);
fill(#0000F0);

final int dim = 10, dd = dim << 1;

for (int row = 0; row < height; row += dim)
  for (int col = (row/dim & 1) == 0 ? -dd : -dim; col < width; 
  rect(col += dd, row, dim, dim));

// http://forum.processing.org/topic/how-to-recreate

size(500, 500);
noLoop();
smooth(4);

final int dim = 10;

background(-1);

stroke(#0000F0);
strokeWeight(dim);

strokeCap(SQUARE);
//strokeCap(PROJECT);

for (int row = dim>>1; row < height; row += dim)
  line(row>>1, row, width - (row>>1), row);