text: let radius = 100;
  function setup() {
    createCanvas(600, 400, WEBGL);
    background(255);
    stroke(0);
    smooth();
  }
  
  function draw() {
    background(255);
  
    rotateY(frameCount * 0.03);
    rotateX(frameCount * 0.04);
  
    let s = 0;
    let t = 0;
    let lastx = 0;
    let lasty = 0;
    let lastz = 0;
  
    while (t < 180) {
      s += 25;
      t += 0.2;
      let radianS = radians(s);
      let radianT = radians(t);
  
      let thisx = 0 + radius * cos(radianS) * sin(radianT);
      let thisy = 0 + radius * sin(radianS) * sin(radianT);
      let thisz = 0 + radius * cos(radianT);
  
      if (lastx != 0) {
        line(thisx, thisy, thisz, lastx, lasty, lastz);
      }
  
      lastx = thisx;
      lasty = thisy;
      lastz = thisz;
    }
  }
  