Formula for the automatic display of a symbol

Hi, I would need a formula to automatically display a symbol (red, orange, or green) in a cell depending on the color of symbols from four other cells.

Examples:

• If there is a green symbol in each of the four cells, then the fifth cell should display green,
• If two of the four cells have an orange symbol and the two other ones a green one, the fifth cell should display orange,

Can you help me with that?

Thank you,

DC