Rendering Points in Unity

I'm trying to render some points in unity but can't get it working… here's my code. I think maybe it has something to do with the shader I'm using? Not sure tough

        m_ptOb = new GameObject();
        MeshRenderer mr = m_ptOb.AddComponent<MeshRenderer>();
        mr.sharedMaterial = new Material(Shader.Find("Unlit/Color"));
        MeshFilter mf = gameObject.AddComponent<MeshFilter>();

        Mesh mesh = new Mesh();
        Vector3[] vertices = new Vector3[m_pt.Length];
        int[] indices = new int[m_pt.Length];
        int[] tris = new int[m_pt.Length / 3];
        Color[] cl = new Color[m_pt.Length];
    
        for (int i = 0; i < vertices.Length; i++)
        {
            vertices[i] = new Vector3(Random.value, Random …