Hello! How do I get objects to scale with Slline?

[qzm26999]

[attachment=239][attachment=239]I use a very clumsy way to control zoom and flash,
我使用一個很笨的方法來控制縮放及閃爍..。

I am a Unity beginner and can't write very deep scripts...
我是個Unity初學者，沒辦法編寫很深入的腳本..。

There is a misspelled word in the script, please forgive me..
腳本中有拼錯字，請原諒我..

Although it has achieved the effect I want, it is difficult to control.
雖然已經達到我要的效果，但是難以控制。