let h;

let recs;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(225);

  w = windowWidth;

  h = windowHeight;

  recs = 4;

  drawRecs();

}

​

function drawRecs(){

  rect(0, 0, w/recs, h);

  rect(w/recs, 0, w/recs, h);

  rect(w/recs*2, 0, w/recs, h);

  rect(w/recs*3, 0, w/recs, h);

}

​

function windowResized(){

  resizeCanvas(windowWidth, windowHeight);

  w = windowWidth;

  h = windowHeight;

  drawRecs();

}

​