My interpretation of this is that the author was hoping for something futile - they 'grew a flower' (put effort or hopes toward) that can't be bloomed (is pointless or futile, will not produce anything) that can't come true (their effort/hope is just a hopeful dream). Basically, the author hoped for something that was not possible.
The song is 5 minutes and 22 seconds long.
Answer:
A line in art is defined as a point moving in space, and it's one of the seven elements of art (line, color, shape, form, texture, value, space).
