Collection of Guitar Chords and Scales

Have finally started uploading guitar chords and scales to my website. I have added a chord chart that will be my starting point o help with song keys from chords to help with modes and scale that can be played over the song in question.

I have also uploaded a good few chords now. Only the basic popular ones for now but this will grow over time.

To begin writing songs based on chord progressions, you need to understand that each key has a series of chords that belong to it and are referred to as a key's 'diatonic chords'. What follows is an explanation of how to find out which chords belong to which key.

A major scale is derived from a progression of whole or half steps on the chromatic scale. The major scale goes like this
Whole - Whole - Half - Whole - Whole - Whole - Half

The C Major Chord Progression

The best scale to start with is probably the C Maj scale (as it does not have any sharps or flats)
It would go like this:
Cmaj - Dmin - Emin - Fmaj - Gmaj - Amin - B diminished

Above are chords in the key of C major. We arrived at these chords by beginning with a C major scale, and using the the major progression we saw above Whole - Whole - Half - Whole - Whole - Whole - Half .

Here is what you should try to bring away from the above:
In every major key, there are seven different chords. The order of these chords are:
major, minor, minor, major, major, minor, and diminished.
The order is the same for whichever major key you are in. the space between each of these chords is as follows:
Between chords 1 and 2: tone or whole, 2 and 3: tone or whole, 3 and 4: semitone or half, 4 and 5: tone or whole, 5 and 6: tone or whole, 6 and 7: tone or whole, 7 and 1: semitone or half
and we are now back to where we started.