My Sketch

let p1;

let p2;

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let p = [];

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let num = 20;

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function setup() {

  createCanvas(windowWidth, 400);

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  noLoop();

​

  strokeWeight(7);

  p.push({x:0,y:height});

  for (let i = 1; i < num; i++) {

    p[i] = { x: (width / num) * i, y: height * random() };

  }

  p.push({x:width,y:height});

​

  // p1 = { x: 0, y: height * random() };

  // p2 = { x: 100, y: height * random() };

}

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function draw() {

  background(0);

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  fill(0,250,0);

  noStroke();

  beginShape();

  vertex(p[0].x,p[0].y);

  for (let i = 0; i < num; i++) {

    //noFill();

    bezierVertex(

      p[i].x + 50,

      p[i].y,

      p[i + 1].x - 50,

      p[i + 1].y,

      p[i + 1].x,

      p[i + 1].y

    );

  }

  vertex(width,height);

  endShape()

​

​

  //bezier(p1.x, p1.y, p1.x + 50, p1.y, p2.x - 50, p2.y, p2.x, p2.y);

}

​