three.js - Remove a group from scene -

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I am using three.js, and I have created a group and inside another group 

  pgrupo = new array (); Fgrupo = new array (); Scene.add (pgrupo [0]) pgrupo [0] .add (fgrupo [0]): pgrupo [0] .add (fgrupo [1]):   
 How can I remove Am I a FGP from the scene?  
 If I use it:  
  scene.remove (fgrupo [0]);   
 or  
  scene.remove (pgrupo [0]);   
 Nothing happened How can I remove these things from this view?   
 
 
 Instead of using arrays and more. () And .remove () methods.  
 Then  
  pgrupo = new THREE.Object3D (); Fgrupo = = New three. Object 3D (); Scene.add (pgrupo);   
 Also the method. The child gives you an array with the object's children.

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