Hi Royan, I spoke with the owner and he likes entry #20 the best with some revision. Is there a way to eliminate the yellow circles and center the symbols inside each color? Also he would like to switch orange to red for the fire symbol. Do you have a different symbol for water, like a wavy line? Finally, he would like to switch the green to the traditional company forest green color, and change the M to the company's gold yellow color while adding the blueprint lines from the original logo behind the m, as in entry #19. Let me know if you have any further questions!