Grid_textures_01.pde

int gap = 20;

void setup() {
  size(1000, 1000); 
  strokeWeight(4);
  strokeCap(SQUARE);
  frameRate(0.5);
}

void draw() {
  background(204);
  drawPattern(0);
  drawPattern(random(TWO_PI));
}

void drawPattern(float angle) {
  pushMatrix();
  translate(width/2, height/2);
  rotate(angle);
  int rowCount = 0;
  for (int y = -300; y <= 300; y += gap*2) {
    for (int x = -300; x <= 300; x += gap) {
      if (rowCount % 2 == 0) {
        line(x, y, x, y + gap*2);
      } else {
        line(x+gap/2, y, x+gap/2, y + gap*2);
      }
    }
    rowCount++;
  } 
  popMatrix();
  
  saveFrame();
}