グラデーション

function setup() {

  createCanvas(windowWidth,windowHeight);

  background(255);

  noStroke();

  for(let i = 0; i < 400; i++){

    let x = random(width/4);

    let y = random(height);

    let diameter = random(y/10.0);

    fill(random(0,20),random(0,40),random(20,40),75);

    ellipse(x,y,diameter,diameter);

  }

  for(let i = 0; i < 300; i++){

    let x = random(width/4)+width/4;

    let y = random(height);

    let diameter = random(y/10.0);

    fill(random(0,10),random(0,20),random(10,20),125);

    ellipse(x,y,diameter,diameter);

  }

  for(let i = 0; i < 200; i++){

    let x = random(width/4)+width/4+width/4;

    let y = random(height);

    let diameter = random(y/10.0);

    fill(random(0,5),random(0,10),random(2,10),175);

    ellipse(x,y,diameter,diameter);

  }

  for(let i = 0; i < 100; i++){

    let x = random(width/4)+width/4+width/4+width/4;

    let y = random(height);

    let diameter = random(y/10.0);

    fill(random(0,1),random(0,2),random(1,2),225);

    ellipse(x,y,diameter,diameter);

  }

}

​

​