Imagine a heart. Pumping, throbbing,beating heart. A red heart. What if you put a small hole in it? right at the side, where it can’t be seen. A small hole. Just prick it with a pin. Drop by drop, the blood drains out. A hole in the heart. Drip,drip,drip.
It turns half full. half empty. It turns whitish pink, from blood red.
Drip.drip.drip.

More blood. The blood itself changes the colour. It turns dark brown. It turns black. The heart is now white, with a slight, faint pink colour. A trail that the red blood left behind. The veins could be seen, branching out in all directions, millions and millions of little squiggly branches, thread like.Then from a corner, you see a black spot. It was spreading, like a drop of black ink on a blotting paper. It started spreading,first rapidly, then slowing down.The veins turned black. Black. Thick, dark fluid was spreading,replacing the faint reds. The lights went out. The heart was black.
It was not throbbing,pounding,beating. It was now still, and black.

black fluidity. slick black vileness slipping its evil form into all that it touched, flowing, nay, crawling past with such a viscous and sinister motion that it spread dark thoughts all around and repulsed life and green and blue attempting to thrive near it.
whoa.wow. intense,and abstract.. and the theme just gels so beautifully with the premise.
Clear signs of suicidal tendencies. Very dark. I like.