I'm working on a project and I want to find only lips keypoint, and I'm using mediapipe and p5.js, so can anyone tell me how can I find only the lips keypoints and place some object on the lips. for now, I'm getting the whole face mash and the code looks like this

faceMash = function () {
    stroke(0);
    strokeWeight(3);

    beginShape(POINTS);
    for (let i = 0; i < detections.multiFaceLandmarks[0].length; i++) {
      let x = detections.multiFaceLandmarks[0][i].x * width;
      let y = detections.multiFaceLandmarks[0][i].y * height;
      vertex(x, y);
    }
    endShape();
  };

detections is a javascript object that contains key points