No. It is not drawn on the floor to dance about in and cite incantations to conjure spirits.
Although you can get that same creepy effect if used properly.

You have most certainly already heard this principle put to work in many songs, without even realizing it. You know the kind, where the song seems to change keys, but still sounds good. Well here is how it works.

It all has to do with relatives. Not the kind like Aunt Edna, the one with a mustache, that used to leave you in shivers when she demanded a kiss every X-mas.(YUCK) Relative keys are being referred to here.
Every key has a relative key. That key will contain some of the same chords, but not all of the chords as the other key. The relative key is the 5th, counting from the first note of the scale. Pretty simple you say? Wait there is more.

First we need to see what chords are contained in the key. We do this by using every other note in the scale. The progression of chords in the C major scale are as follows:
Major=(M) minor=(m) diminished=( o)
C/M D/m E/m F/M G/M A/m B/o C/M

The progression of chords in the G major scale are as follows:
G/M A/m B/m C/M D/M E/m F#/o G/M

Notice how both scales have chords which correspond to the other scale

C/M E/m G/M A/m

If you were to, lets say for the sake of arguement, follow a 1-5-2 chord rhythm format for a song. Use the same chord structure, but change to a relative key.
In C major it would be
C/M-G/M-D/m
Those same chords in G major would be
C/M-G/M-D/M
See the similarities?

This technique is rather simple, but has great results. It is especially useful in bridges or if you want to add a stop after the bridge in a song. The different texture gives a great effect when you come back in with the original key. Give it a try. I am sure it will add flavor to your music.

The Circle of 5ths is a very useful tool in helping to memorize the order of sharp and flat keys as well as the order that the sharps and flats occur in the scales.
Start with the C major scale(the only scale without sharps of flats).
Moving clockswise there is one more sharp added with each scale. Moving counter-clockwise there is one more flat added. All in increments of 5ths. The major scale is on the outer ring. It's corresponding relative minor is on the inner ring. Cool eh?