Utils.delay(delay, handler)

Calls a funtion after a delay. Delay is defined in seconds.
译：调用延迟后的功能。延迟在秒内定义。

Arguments（参数）

1. delay — A number, representing seconds. 译：一个数字，代表秒。
2. handler — A function. 译：一个函数。

Utils.delay 0.5, ->
    print "hello"

# Output: "hello", after 0.5 seconds