How would you draw a pyramid of numbers for a dog with fleas? What shape would the pyramid take?

Since fleas usually undergo 4 steps of transformation, i would draw 4 floors of pyramid

- The bottom floor is when the fleas still in the form of eggs

- The second floor is when the eggs transformed into larva

- The third floor is when the larva transformed into pupae

- The top of the pyramid is when the pupae already fully transformed into adult fleas