Um... This should help.

There are two different types of diminished scales the whole-half (often called 'whole diminished') and half-whole (often called 'half diminished'). The whole-half scale is simply whole step-half step-whole step-half step... to compute the diminished scale. The half-whole is the same thing but starting the scale with a half step so it would be... half step-whole step-half step-whole step...

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