What spring did

The prompt for Poets and story tellers United was memories and dreams
I focussed on the memory part though 

What spring did 

A memory decomposing like a leaf.
I gather fragments,
bits of earth
but also of beauty
of what spring did,
that timid green
the blossoming,
the opening of a heart.

My mind stretches,
trying to fetch something
a fragrance,
lyrics forgotten,
but the melody,
the allegro,
still dancing inside me.

I carry it
as I carry all life within me.

When I spread the net
over the flowers
to gather the caterpillars
of the past;

Have they become
butterflies
inside me

or is it simply that my eyes
captured their colours
when the light
climbed the flowers?