Butterfly/bat

function setup() {
  createCanvas(400, 400);
}

function draw() {
  background(0);
  
  let t = frameCount / 5
  let a = sin(t / 7) * 0.05 + sin(t) * 0.05 + 0.1
  noStroke()
  fill(200, 200, 100, 150)
  translate(200 + sin(sin(t / 4) / 2 + t / 10) * 5, 200 - sin(t / 3) ** 2 * 10)
  scale(2)
  rotate(-PI / 2 - a)
  for (let i = 0; i < 2; i ++) {
    push()
    translate(-66, 66)
    beginClip({invert: true})
    circle(-25, -25, 100)
    endClip()
    beginClip({invert: true})
    circle(25, 25, 100)
    endClip()
    beginClip()
    circle(-25, -25, 200)
    endClip()
    beginClip()
    circle(25, 25, 200)
    endClip()
    circle(50, -50, 200)
    pop()
    rotate(PI / 2 + a * 2)
  }
}