How to implement ThreeJS please without type="module"

Questions
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5 
    const scene = new THREE.Scene();
    var container;
    container = document.getElementById( "stage" );

    scene.background = new THREE.Color().setHSL( 0.6, 0, 1 );
    scene.fog = new THREE.Fog( scene.background, 1, 5000 );

    var hemiLight = new THREE.HemisphereLight( 0xffffff, 0x444444, 1.5 );
    hemiLight.position.set( 0, 300, 0 );
    scene.add( hemiLight );

    var dirLight = new THREE.DirectionalLight( 0xffffff );
    dirLight.position.set( 75, 300, -75 );


    scene.add( dirLight );

    var containerWidth = container.offsetWidth;
    console.log(containerWidth);
    var containerHeight = (containerWidth / 3)*2;
    var camera = new THREE.PerspectiveCamera( 75, containerWidth / containerHeight, 0.1, 1000 );


    var axesHelper = new THREE.AxesHelper( 5 );
    scene.add( axesHelper );


    function rotateObject(object, degreeX=0, degreeY=0, degreeZ=0) {
        object.rotateX(THREE.Math.degToRad(degreeX));
        object.rotateY(THREE.Math.degToRad(degreeY));
        object.rotateZ(THREE.Math.degToRad(degreeZ));
    }

    var renderer = new THREE.WebGLRenderer( { alpha: true, antialias: true  } );

    renderer.setSize( containerWidth, containerHeight );

    renderer.setClearColor( 0xffffff, 0);

    renderer.outputEncoding = THREE.sRGBEncoding;

    const controls = new OrbitControls( camera, renderer.domElement );

    camera.position.y = 0.1; //move down slightly
    camera.position.z = 2; //zoom

    controls.update();

    var loader = new GLTFLoader();

    var bench = "";

    loader.load( 'bench.glb', function ( gltf ) {

        bench = gltf.scene;

        scene.add( gltf.scene );

    }, undefined, function ( error ) {

        console.error( error );

    } );

    container.appendChild( renderer.domElement );


    function addObj(obj){
        scene.remove(bench); /* removing the square object here, */

        loader.load( obj+'.glb', function ( gltf ) {

            bench = gltf.scene;

            scene.add( gltf.scene );

        }, undefined, function ( error ) {

            console.error( error );

        } );

    };

    document.querySelectorAll(".control3d").forEach(control3d => {
        control3d.addEventListener("click", (e) => {
            e.preventDefault();
            addObj(control3d.id);
        })
    });

    function myFunction(e) {
        e.preventDefault();
        camera.position.y = 0.1; //move down slightly
        camera.position.z = 2; //zoom
        camera.position.x = 0;


        controls.update();
    }

    document.getElementById("reset").addEventListener("click", myFunction);

    var animate = function () {
        requestAnimationFrame( animate );


        renderer.render( scene, camera );
    };

    animate();