text: function setup() {
    createCanvas(200, 200)
    describe('A single point moving along the path of a sine wave')
  }
  
  function draw() {
    background('black')
  
    let r = 50
    let x = frameCount
    let y = r * sin(x * 0.01 * TWO_PI) + 100
  
    strokeWeight(3)
    stroke('dodgerblue')
    point(x, y)
  }