The First Heart with the small cracks in it, is Stage one, Ace is slowly letting you rude people get take away his happyniss, and the words "It only hurts a little, But why would you care"

The Second Heart with the more bigger cracks in it, Ace is no longer holding onto to hope, those words "Only Time can til, before life shatters it...."

The third heart that is now in pieces with only the center of the heart being red, Ace has giving up on hope, and the words "You can't fix something that's already broken"

The Fourth Stage is that piece with only a little red in center, that's what left of Ace's heart at this point, and the with that one "One Piece is all I need"

The Fifth Stage yes there is nothing left of his heart,

Ace is At Stage 2 right now