What are modes?

Modes give songs different sounds.
The seven musical modes are
1.Ionian
2. Dorian
3. Phrygian
4. Lydian
5. Mixolydian
6. Aeolian
7. Locrian

They sit in this order, because

The Ionian mode starts on the 1st note of a scale and the pattern is
T-T-ST-T-T-T-ST *In other words it is the same as a major scale.

Dorian Mode is T-ST-T-T-T-ST-T it starts on the 2nd note of the scale

Phrygian Mode ST-T-T-T-ST-T-T it starts on the 3rd note of the scale

Lydian Mode T-T-T-ST-T-T-ST 4th note of the scale

Mixolydian Mode T-T-ST-T-T-ST-T 5th note of the scale

Aeolian Mode T-ST-T-T-ST-T-T 6th note of the scale

Locrian Mode ST-T-T-ST-T-T-T 7th note of the scale

To remember the seven modes of music, many musicians use the following memory aid: "I Do F(ph)ollow Lonely Men And Laugh."

* T= Tone ST= Semitone