Points Geometry particle creaction . please help

Questions
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1

i want a glob with points particle like in this website website
but what i have is this My code

const particles = [];
    const particleGeometry = new THREE.BufferGeometry();
    const pointMaterial = new THREE.PointsMaterial({ color: 0xffffff, size: 0.001 });

    let model;

    loader.load('/earth.glb', (gltf) => {
      model = gltf.scene;
      model.scale.set(0.7, 0.7, 0.7);
      model.position.set(0, -0.1, -1);

      gltf.scene.traverse((obj) => {
        if (obj.isMesh) {
          const geometry = obj.geometry.clone();
          const positions = geometry.attributes.position.array;

          for (let i = 0; i < positions.length; i += 3) {
            const x = positions[i];
            const y = positions[i + 1];
            const z = positions[i + 2];

            const particle = new THREE.Vector3(x, y, z);
            particles.push(particle);
          }
        }
      });

      const particlePositions = new Float32Array(particles.length * 3);
      for (let i = 0; i < particles.length; i++) {
        particlePositions[i * 3] = particles[i].x;
        particlePositions[i * 3 + 1] = particles[i].y;
        particlePositions[i * 3 + 2] = particles[i].z;
      }

      particleGeometry.setAttribute('position', new THREE.BufferAttribute(particlePositions, 3));

      const particleSystem = new THREE.Points(particleGeometry, pointMaterial);
      particleSystem.scale.set(0.4, 0.4, 0.4)
      scene.add(particleSystem);
    });
2

I can’t open the codesandbox. All I see is this message:

Unable to access this workspace. It is likely that you are not a member of the team that this project belongs to. To be able to access the web editor of this repository and edit the code, you need to be invited to the team.

4

i am sorry new link