Garlic Problem

You have 12 garlics identical in size and appearance but 1 is an odd weight (could be either light or heavy).

You have a set of balance scales which will give 3 possible readings:

• Left = Right,
• Left > Right, or
• Left < Right

You have only 3 chances to weigh the garlics in any combination using the scales.

Find which garlic is the odd one and if it's heavier or lighter than the rest.

How do you do it?