Sol LeWitt Wall Drawing #56 Solution

function setup() {

  const w = 800;

  const h = 800;

  createCanvas(w, h);

  strokeWeight(1);

}

​

function draw() {

  background(255);

  const inc = 10;

  const w = 800;

  const h = 800;

  // vertical lines from top to bottom, whole canvas

  for(let i=0; i<=w; i=i+inc){

  line(i,0, i,w);

  } 

  // horizontal lines from side to side, 3 quarters of canvas

  // draw top right quadrant first

  for(let i=0; i<=(w/2); i=i+inc){

  line(w/2,i, w,i); 

  } 

  // draw horizontal lines for quads 3 and 4

  for(let i=(h/2); i<=h; i=i+inc){

  line(0,i, w,i); 

  } 

  //now diagonals in quads 3 and 4

  //quad 3 first half lines getting bigger

  x=0;

  for(let y=(w/2); y<w; y=y+inc){

      line(0,y+inc, x+inc, w/2); 

      x=x+inc;} 

  // quad 3 middle section lines all same length going to x = 400

  for(let x=inc; x<=(w/2); x=x+inc){ //offset first line by inc so i dont repeat 

      line(x,w, x+(w/2), (w/2)); 

      } 

  //finish quad 4 lines getting smaller

  for(let y=(w/2); y<w; y=y+inc){

      line(y+inc,w, w, y+inc); 

  }

  //ok last bit here quad 4 only diagonals in other direction

  //starting at center lines get smaller

  y=0;

  for(let x=(w/2); x<w; x=x+inc){

      line(x,(w/2), w, w-y); 

      y=y+inc;}

  //now really last bit quad for lines getting smaller dont draw first one

  y=0;

  for(let x=(w/2); x<w; x=x+inc){

      line((w/2),x+inc, w-inc-y,w); 

      y=y+inc;}

}