examples/render: fix window not showing up in macOS

Signed-off-by: Lilis Iskandar <lilis@veand.co>

examples/render/render.go

@@ -34,6 +34,17 @@ func run() int {
 	}
 	defer renderer.Destroy()
 
+	running := true
+
+	for running {
+		for event := sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
+			switch event.(type) {
+			case *sdl.QuitEvent:
+				running = false
+			}
+		}
+
+		renderer.SetDrawColor(0, 0, 0, 255)
 		renderer.Clear()
 
 		renderer.SetDrawColor(255, 255, 255, 255)
@@ -63,8 +74,8 @@ func run() int {
 		renderer.FillRects(rects)
 
 		renderer.Present()
-	sdl.PollEvent()
-	sdl.Delay(2000)
+		sdl.Delay(16)
+	}
 
 	return 0
 }