Implementing these 3 schedules
[schedule setRepeatInterval: 1]
[schedule at: 1 createActionTo: obj message: M(message)]
[schedule at: 0 createActionTo: obj1 message:M(message1)]
[schedule at: 4 createActionTo: obj4 message:M(message4)]
[schedule setRepeatInterval: 2]
[schedule at: 0 createActionTo: obj message: M(message)]