Death Note

I started watching this Anime. It's about a bored Shinigami/Death God who drops his Death Note (book) in the human world. Boy genius Light Yagami happens upon it. Instructions read:

• The human whose name is written in this note shall die.
• This note will not take effect unless the writer has the subject's face in their mind when writing his/her name. Therefore, people sharing the same name will not be affected.
• If the cause of death is written within 40 seconds of writing the subject's name, it will happen.
• If the cause of death is not specified, the subject will simply die of a heart attack.
• After writing the cause of death, the details of the death should be written in the next 6 minutes and 40 seconds.

So far so good.