Hello Tama-tama-nat.
Thanks for the PM.
Making a log is as simple as bringing out a Tamagotchi, playing it, and going to the TamaTalk Section, "The Library," then I click on "Tamagotchi Logs" is what I believe it is called. Then you just create a topic, and you've got a log!
Changing colors is all about this thingy called BBCode!
How I do it, is before I start writing my log entry, I click on that little dropdown list that says "COLOR." Then I click on the color I want and the code for that color appears on the message. Then, when I am done with the entry, I click on that link right next to the color thing that says "Close all Tags." Now you have a colorful message for when you post!