obj move

src/main.js

@@ -1,3 +1,16 @@
 const app = new PIXI.Application({width:640, height:480});
+document.body.appendChild(app.view);
 
-document.body.appendChild(app.view);
+let g = new PIXI.Graphics;
+g.beginFill(0xFF0000, 1);
+g.drawCircle(0, 0, 30);
+g.endFill();
+
+app.stage.addChild(g);
+
+let g_t = 0;
+app.ticker.add(delta=>{
+    g_t += delta;
+    g.x = Math.sin(g_t * 0.05)*100 + app.renderer.width/2;
+    g.y = app.renderer.height/2;
+})