1.   A dark stain spread over the grey carpet.

2.   A dark stain spread over the grey patterned carpet.

3.   He watched the dark stain spread over the gray carpet.

4.   One of the glasses had fallen on to its side and a red stain had spread from it on to the tablecloth.

5.   A dark red stain was spreading across his shirt.

6.   A red stain spreads through the surgical drape as if someone had spilled a glass of wine on a white tablecloth.

7.   The stain is spreading.