【p5.js】sin

function setup() {
  createCanvas(400, 400);
  background(255);
  noStroke();
  fill(0);
  
  let y;
  const A = height/2;
  
  for (let x = 0; x <= width; x+=10) {
    y = A * sin(map(x, 0, width, 0, PI*2)) + A;
    ellipse(x, A, 5, 5);
    ellipse(x, y, 5, 5);
  }

  save('sin.png');
}