diff --git a/content/assets/zero-alloc-call-sched/app.png b/content/assets/zero-alloc-call-sched/app.png
new file mode 100644
index 0000000..094899f
Binary files /dev/null and b/content/assets/zero-alloc-call-sched/app.png differ
diff --git a/content/assets/zero-alloc-call-sched/app/window.go b/content/assets/zero-alloc-call-sched/app/window.go
index 3d27f23..1c0ee44 100644
--- a/content/assets/zero-alloc-call-sched/app/window.go
+++ b/content/assets/zero-alloc-call-sched/app/window.go
@@ -36,7 +36,7 @@ func NewWindow() (*Win, error) {
 		err error
 	)
 	mainthread.Call(func() {
-		w.win, err = glfw.CreateWindow(640, 480, "", nil, nil)
+		w.win, err = glfw.CreateWindow(640, 480, "golang.design/research", nil, nil)
 		if err != nil {
 			return
 		}
diff --git a/content/assets/zero-alloc-call-sched/main.go b/content/assets/zero-alloc-call-sched/cmd/app2/main.go
similarity index 94%
rename from content/assets/zero-alloc-call-sched/main.go
rename to content/assets/zero-alloc-call-sched/cmd/app2/main.go
index d301e8c..5cad513 100644
--- a/content/assets/zero-alloc-call-sched/main.go
+++ b/content/assets/zero-alloc-call-sched/cmd/app2/main.go
@@ -56,9 +56,8 @@ options:
 		panic(err)
 	}
 
-	done := make(chan struct{}, 3)
+	done := make(chan struct{}, 2)
 	go func() {
-		defer func() { done <- struct{}{} }()
 		f, _ := os.Create(*traceF)
 		defer f.Close()
 		trace.Start(f)
@@ -79,5 +78,4 @@ options:
 	}()
 	<-done
 	<-done
-	<-done
 }
diff --git a/content/assets/zero-alloc-call-sched/mainthread/mainthread.go b/content/assets/zero-alloc-call-sched/mainthread/mainthread.go
index 226595e..4296b7e 100644
--- a/content/assets/zero-alloc-call-sched/mainthread/mainthread.go
+++ b/content/assets/zero-alloc-call-sched/mainthread/mainthread.go
@@ -21,7 +21,6 @@ func init() {
 func Init(main func()) {
 	done := donePool.Get().(chan struct{})
 	defer donePool.Put(done)
-
 	go func() {
 		defer func() {
 			done <- struct{}{}
@@ -48,7 +47,6 @@ func Init(main func()) {
 func Call(f func()) {
 	done := donePool.Get().(chan struct{})
 	defer donePool.Put(done)
-
 	funcQ <- funcData{fn: f, done: done}
 	<-done
 }