moved event and draw loops to Start method

screen.go

@@ -41,9 +41,6 @@ func NewScreen(root View) (*Screen, error) {
 
 	s.KeyPressed = CloseOnCtrlC(s)
 
-	go s.eventloop()
-	go s.drawloop()
-
 	return s, nil
 }
 
@@ -57,6 +54,10 @@ func (s *Screen) Start() error {
 	defer close(s.redrawCh)
 
 	s.scr.EnableMouse()
+
+	go s.eventloop()
+	go s.drawloop()
+
 	s.started = true
 	return <-s.stopCh
 }