You may wish to use elemental symbols in your rituals, whether by visualizing them to empower yourself with the energy of a particular element, or by drawing them in the air or on the earth during magic. I'll simply introduce the symbols, they are simple yet very magical.

Earth is an inverted triangle with a line through the middle, it is usually green but can also be black.

Air is an upright triangle with a line through the middle, it is yellow in color.

Fire is a red triangle.

Water is a blue inverted triangle.

The symbol which represents all of the elements together (which in some ways can also represent spirit, or "akasha") is the Star of David: