Geistertücher

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(0);

  rectMode(CENTER);

}

​

function draw() {

  //background(0);

  // jump to the center of the sketch

  translate(width/2, height/2);

  //mapping of sin over time (-1 , +1) to (-200, 200)

  //speed is defined by /1000

  let s = map(sin(millis()/1500), -1, 1, -200, 250);

  let sc = map(cos(millis()/1500), -1, 1, -200, 250);

  //mapping of sin over time to an angle 0-PI

  let r = map(sin(millis()/1500), -5, 10, 50, PI);

  let c = map(sin(millis()/1000), -1, 1, 0, 50);

  let w = map(sin(millis()/1000), -1, 1, 100, 250);

  noFill();

  stroke(255, c);

  translate(s, sc);

  translate(r);

  rotate(r);

  //strokeWeight(c);

  rect(0, 0, w, w);

  ellipse(0, 0, 100, 200);

}