The Order Of The Modes

Each key will have seven natural chord positions, which are typically symbolized by roman numerals as such:

Numeral    Example      Major/minor
I                C                 Major        
II               D                minor
III              E                minor
IV              F                Major
V               G                Major
VI              A                minor
VII             B                minor

These seven chords make up the Key of Cmajor.  By using certain techniques and choosing certain chords you can create different moods.

Try for example: I IV V  also known as - Cmaj Fmaj Gmaj

And compare it to: VI III II also known as Am Em Dm