220116b

function setup() {

  w=720;

  createCanvas(w, w);

  background(255);

​

   let img = gen_grad(w);

   image(img, 0, 0);

}

​

function gen_grad(size){

  img = createGraphics(size, size);

  let gradientStroke = drawingContext.createLinearGradient(

    size*0.495, 0, size*0.505, 0

  );

​

  gradientStroke.addColorStop(0, "#000000");

  gradientStroke.addColorStop(1, "#ffffff");

​

  img.drawingContext.fillStyle = gradientStroke;

​

  img.strokeWeight(0);

  img.rect(0, 0, size, size);

  return img

}

​

//save PNG

function keyPressed() {

  save("img_" + month() + day() + hour() + minute() + second() + ".png");

}