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                <div id="viewport" style="width:100%; height:100%; background:white;"></div>


                html, body { width: 100%; height: 100%; background: white; overflow: hidden; margin: 0; padding: 0; }



                // Setup to load data from rawgit
    "data", new NGL.StaticDatasource( "//" )

// Create NGL Stage object
var stage = new NGL.Stage( "viewport" );

// Handle window resizing
window.addEventListener( "resize", function( event ){
}, false );

function showStructure (stage, o, chain, color, addToStage) {
  if (addToStage === true) {
    const selection = new NGL.Selection(":"+chain)
    const struc = o.structure.getView(selection)
    const comp = stage.addComponentFromObject(struc)
    o = comp
  o.addRepresentation("cartoon", {
    color: color

function loadStructure (pdb_id,chain,color,addToStage) {
  const url = "rcsb://"+pdb_id+".pdb"
  stage.loadFile(url).then(stageObj => {

//depending if the mols are added to the stage (true) or not (false)
//the mols can be moved independently

//do not add to stage --> mols can be moved indepently by
// drag-ctrl+shift + right click

//add to stage --> mols can only moved together
// this.loadStructure("1blu","A","red",true)
// this.loadStructure("1crn","A","blue",true)