diff --git a/pointlightshadow4.js b/pointlightshadow4.js
deleted file mode 100644
index f665704952bf9f0113e1b044e990edbae7d4536f..0000000000000000000000000000000000000000
--- a/pointlightshadow4.js
+++ /dev/null
@@ -1,74 +0,0 @@
-const function4 = function(){
-const h_scr2 = window.innerWidth;
-const v_scr2 = window.innerHeight;
-const scene2 = new THREE.Scene();
-const camera2 = new THREE.PerspectiveCamera(120, h_scr2/v_scr2, 0.1, 1000);
-camera2.position.y = 15;
-camera2.lookAt(0,0,0); 
-
-//Create a WebGLRenderer and turn on shadows in the renderer
-const renderer2 = new THREE.WebGLRenderer({canvas: HelloCanvas4}); 
-renderer2.setSize( h_scr2, v_scr2 ); 
-renderer2.shadowMap.enabled = true;
-const light2 = new THREE.PointLight( 0xffffff, 1, 100 );
-//const light2 = new THREE.DirectionalLight( 0xffffff, 1);
-//light2.position.set( 0, 0, 1 );
-//directioanl은 항상 위에서 온다.
-//light2.rotaion.x = 90;
-light2.castShadow = true; // default false
-//light2.autoUpdate = false;
-scene2.add( light2 );
-
-//Set up shadow properties for the light
-//light2.shadow.mapSize.width = 128; // default
-//light2.shadow.mapSize.height = 128; // default
-light2.shadow.camera.near = 20;
-//light2.shadow.camera.far = 500; // default
-
-//Create a sphere that cast shadows (but does not receive them)
-const sphereGeometry = new THREE.SphereGeometry( 5, 32, 32 );
-const sphereMaterial = new THREE.MeshPhongMaterial( { 
-    color: 0xffff00, shininess : 90.0 });
-const sphere = new THREE.Mesh( sphereGeometry, sphereMaterial );
-sphere.castShadow = true; //default is false
-sphere.receiveShadow = false; //default
-scene2.add( sphere );
-
-//Create a plane that receives shadows (but does not cast them)
-const planeGeometry = new THREE.PlaneGeometry( 60, 60, 32, 32 );
-const planeMaterial = new THREE.MeshStandardMaterial( { color: 0xffffff } )
-const plane = new THREE.Mesh( planeGeometry, planeMaterial );
-plane.receiveShadow = true;
-plane.rotation.x = -1.57;
-plane.position.set(0,-5,0);
-scene2.add( plane );
-
-//Create a helper for the shadow camera (optional)
-const helper = new THREE.CameraHelper( light2.shadow.camera );
-scene2.add( helper );
-
-
-var x = -12;
-var x_trans = 0;
-const animate = function () {
-	requestAnimationFrame( animate );
-
-    if(x>=12)
-    {
-        x_trans = -0.1;
-    }
-    else if(x<=-12)
-    {
-        x_trans = +0.1;
-    }
-
-    x += x_trans;
-
-
-	light2.position.set( x, 10, 0 );
-
-	renderer2.render( scene2, camera2 );
-};
-animate();
-}
-function4();
\ No newline at end of file